Weak WiFi signal and unstable connection

Hello
I have installed Manjaro on this machine 3 years ago (as soon as I bought it actually), but since a little more than 2 weeks, I have a very crappy WiFi. I thought it was an ISP problem at first (I don’t have other devices to check), but they didn’t find any problem on their side.
I started to look for related problems, and I tried several ones:

https://askubuntu.com/questions/887238/atheros-qca9565-ar9565-unstable-connection-slow-wireless-ubuntu-16-04

It didn’t change anything. I also didn’t find anyone who’s problem came a long time after installation

inxi:

System:
  Kernel: 5.10.52-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64 
  root=UUID=6ab256b5-4041-4180-bab6-dda068075cca rw quiet apparmor=1 
  security=apparmor udev.log_priority=3 pcie_aspm=off ath10k_core.skip_otp=y 
  Desktop: Cinnamon 5.0.5 tk: GTK 3.24.30 vt: 7 dm: LightDM 1.30.0 
  Distro: Manjaro Linux base: Arch Linux 
Machine:
  Type: Laptop System: ASUSTeK product: X541NA v: 1.0 serial: <filter> 
  Mobo: ASUSTeK model: X541NA v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: X541NA.313 date: 08/10/2017 
Battery:
  ID-1: BAT0 charge: 24.3 Wh (93.1%) condition: 26.1/34.6 Wh (75.4%) 
  volts: 10.8 min: 10.8 model: ASUSTeK ASUS Battery type: Li-ion serial: N/A 
  status: Charging cycles: 1137 
Memory:
  RAM: total: 3.7 GiB used: 2.45 GiB (66.2%) 
  RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
CPU:
  Info: Quad Core model: Intel Pentium N4200 bits: 64 type: MCP arch: Goldmont 
  family: 6 model-id: 5C (92) stepping: 9 microcode: 44 cache: L2: 1024 KiB 
  bogomips: 8756 
  Speed: 1807 MHz min/max: 800/2500 MHz Core speeds (MHz): 1: 1807 2: 2388 
  3: 1844 4: 1571 
  Flags: 3dnowprefetch acpi aes aperfmperf apic arat arch_capabilities 
  arch_perfmon art bts cat_l2 clflush clflushopt cmov constant_tsc cpuid 
  cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts ept ept_ad erms est 
  flexpriority fpu fsgsbase fxsr ht ibpb ibrs ida intel_pt lahf_lm lm mca mce 
  md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae pat pbe 
  pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pts rdrand rdseed 
  rdt_a rdtscp rep_good sdbg sep sha_ni smap smep ss sse sse2 sse4_1 sse4_2 
  ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust tsc_deadline_timer 
  tsc_known_freq tsc_reliable vme vmx vnmi vpid x2apic xgetbv1 xsave xsavec 
  xsaveopt xsaves xtopology xtpr 
  Vulnerabilities: Type: itlb_multihit status: Not affected 
  Type: l1tf status: Not affected 
  Type: mds status: Not affected 
  Type: meltdown status: Not affected 
  Type: spec_store_bypass status: Not affected 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: disabled, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
Graphics:
  Device-1: Intel Celeron N3350/Pentium N4200/Atom E3900 Series Integrated 
  Graphics 
  vendor: ASUSTeK driver: i915 v: kernel bus-ID: 00:02.0 chip-ID: 8086:5a84 
  class-ID: 0300 
  Device-2: IMC Networks USB2.0 VGA UVC WebCam type: USB driver: uvcvideo 
  bus-ID: 1-5:3 chip-ID: 13d3:5a01 class-ID: 0e02 serial: <filter> 
  Display: x11 server: X.Org 1.20.11 driver: loaded: intel 
  unloaded: modesetting alternate: fbdev,vesa display-ID: :0 screens: 1 
  Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.2x8.0") 
  s-diag: 414mm (16.3") 
  Monitor-1: eDP1 res: 1366x768 hz: 60 dpi: 102 size: 340x190mm (13.4x7.5") 
  diag: 389mm (15.3") 
  OpenGL: renderer: Mesa Intel HD Graphics 505 (APL 3) v: 4.6 Mesa 21.1.5 
  direct render: Yes 
Audio:
  Device-1: Intel Celeron N3350/Pentium N4200/Atom E3900 Series Audio Cluster 
  vendor: ASUSTeK driver: snd_hda_intel v: kernel 
  alternate: snd_soc_skl,snd_sof_pci bus-ID: 00:0e.0 chip-ID: 8086:5a98 
  class-ID: 0403 
  Sound Server-1: ALSA v: k5.10.52-1-MANJARO running: yes 
  Sound Server-2: JACK v: 0.125.0 running: no 
  Sound Server-3: PulseAudio v: 14.2 running: yes 
  Sound Server-4: PipeWire v: 0.3.32 running: yes 
Network:
  Device-1: Realtek RTL810xE PCI Express Fast Ethernet vendor: ASUSTeK 
  driver: r8169 v: kernel port: e000 bus-ID: 01:00.0 chip-ID: 10ec:8136 
  class-ID: 0200 
  IF: enp1s0 state: down mac: <filter> 
  Device-2: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter 
  vendor: Lite-On driver: ath9k v: kernel port: e000 bus-ID: 02:00.0 
  chip-ID: 168c:0036 class-ID: 0280 
  IF: wlp2s0 state: up mac: <filter> 
  IP v4: <filter> type: dynamic noprefixroute scope: global 
  broadcast: <filter> 
  IP v6: <filter> type: noprefixroute scope: link 
  WAN IP: <filter> 
Bluetooth:
  Device-1: Lite-On type: USB driver: btusb v: 0.8 bus-ID: 1-4:5 
  chip-ID: 04ca:3010 class-ID: e001 
  Report: rfkill ID: hci0 rfk-id: 1 state: down bt-service: enabled,running 
  rfk-block: hardware: no software: yes address: see --recommends 
Logical:
  Message: No logical block device data found. 
RAID:
  Message: No RAID data found. 
Drives:
  Local Storage: total: 465.76 GiB used: 313.62 GiB (67.3%) 
  SMART Message: Required tool smartctl not installed. Check --recommends 
  ID-1: /dev/sda maj-min: 8:0 vendor: Toshiba model: MQ01ABF050 
  size: 465.76 GiB block-size: physical: 4096 B logical: 512 B speed: 3.0 Gb/s 
  type: HDD rpm: 5400 serial: <filter> rev: 1J scheme: GPT 
  Optical-1: /dev/sr0 vendor: HL-DT-ST model: DVDRAM GUE1N rev: AS00 
  dev-links: cdrom 
  Features: speed: 24 multisession: yes audio: yes dvd: yes 
  rw: cd-r,cd-rw,dvd-r,dvd-ram state: running 
Partition:
  ID-1: / raw-size: 465.46 GiB size: 457.16 GiB (98.22%) 
  used: 313.62 GiB (68.6%) fs: ext4 dev: /dev/sda2 maj-min: 8:2 label: N/A 
  uuid: 6ab256b5-4041-4180-bab6-dda068075cca 
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) 
  used: 280 KiB (0.1%) fs: vfat dev: /dev/sda1 maj-min: 8:1 label: N/A 
  uuid: 15C8-6DD2 
Swap:
  Alert: No swap data was found. 
Unmounted:
  Message: No unmounted partitions found. 
USB:
  Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 8 rev: 2.0 
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900 
  Device-1: 1-4:5 info: Lite-On type: Bluetooth driver: btusb interfaces: 2 
  rev: 1.1 speed: 12 Mb/s power: 100mA chip-ID: 04ca:3010 class-ID: e001 
  Device-2: 1-5:3 info: IMC Networks USB2.0 VGA UVC WebCam type: Video 
  driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA 
  chip-ID: 13d3:5a01 class-ID: 0e02 serial: <filter> 
  Device-3: 1-7:4 info: Realtek RTS5129 Card Reader Controller 
  type: <vendor specific> driver: rtsx_usb,rtsx_usb_ms,rtsx_usb_sdmmc 
  interfaces: 1 rev: 2.0 speed: 480 Mb/s power: 500mA chip-ID: 0bda:0129 
  class-ID: ff00 serial: <filter> 
  Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 7 rev: 3.0 speed: 5 Gb/s 
  chip-ID: 1d6b:0003 class-ID: 0900 
Sensors:
  System Temperatures: cpu: 37.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 2200 
Info:
  Processes: 222 Uptime: 8h 1m wakeups: 23431 Init: systemd v: 248 
  tool: systemctl Compilers: gcc: 11.1.0 Packages: 1521 pacman: 1518 lib: 441 
  flatpak: 0 snap: 3 Shell: Bash v: 5.1.8 running-in: gnome-terminal 
  inxi: 3.3.06

I know I don’t have the best machine, I’m planning on buying a new one, but I don’t have the means right now

Try different kernels like 5.4 LTS or the latest stable 5.13. Keep 5.10 around since it’s an LTS release. It’s always good to have a few different kernels installed as fallback.

between yesterday and today, I tried both 5.4 and 5.13, it didn’t change any thing

Hi, use normal device, create log

sudo dmesg > ~/dmesg.log

file dmesg.log will be in home dir paste it on pastebin.com. In reply use URL.

Sorry I didn’t saw your answer. Here is the link: [ 0.000000] x86/fpu: xstate_offset[4]: 640, xstate_sizes[4]: 64[ 0.00 - Pastebin.com
FYI since 3 days ago I have a smartphone and I’m using its data via tethering, I don’t know if it changes anything from what’s in the log