Slow wifi on new installation

Hi!
First of all, yes, this question was asked already 100 times or so. However, I am not able to fix this problem.

My wifi download should be about 50 Mbit/s and upload 10 Mbit/s. Speedtest results show download 2 Mbit/s and upload 10 Mbit/s. So, the download is kinda problematic.

inxi -Fazy

System:
  Kernel: 5.15.65-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.15-x86_64
    root=UUID=2d0d015d-af78-49a8-9743-1e6e3b764716 rw quiet
    udev.log_priority=3
  Desktop: KDE Plasma v: 5.25.5 tk: Qt v: 5.15.5 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Convertible System: Dell product: Inspiron 5406 2n1 v: N/A
    serial: <superuser required> Chassis: type: 31 serial: <superuser required>
  Mobo: Dell model: 0VMRNH v: A00 serial: <superuser required> UEFI: Dell
    v: 1.16.0 date: 07/14/2022
Battery:
  ID-1: BAT0 charge: 30.3 Wh (100.0%) condition: 30.3/39.8 Wh (76.0%)
    volts: 12.6 min: 11.2 model: SMP DELL C5KG60A type: Li-poly serial: <filter>
    status: full
  Device-1: hid-0018:04F3:2A82.0001-battery model: CUST0000:00 04F3:2A82
    serial: N/A charge: N/A status: N/A
CPU:
  Info: model: 11th Gen Intel Core i7-1165G7 bits: 64 type: MT MCP
    arch: Tiger Lake gen: core 11 level: v4 built: 2020 process: Intel 10nm
    family: 6 model-id: 0x8C (140) stepping: 1 microcode: 0xA4
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 320 KiB desc: d-4x48 KiB; i-4x32 KiB L2: 5 MiB desc: 4x1.2 MiB
    L3: 12 MiB desc: 1x12 MiB
  Speed (MHz): avg: 788 high: 1100 min/max: 400/4700 scaling:
    driver: intel_pstate governor: powersave cores: 1: 400 2: 813 3: 735 4: 1009
    5: 563 6: 1100 7: 741 8: 948 bogomips: 27040
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities:
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: retbleed status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl and seccomp
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 status: Vulnerable: eIBRS with unprivileged eBPF
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel TigerLake-LP GT2 [Iris Xe Graphics] vendor: Dell
    driver: i915 v: kernel arch: Gen-12.1 process: Intel 10nm built: 2020-21
    ports: active: eDP-1 empty: DP-1,DP-2,HDMI-A-1 bus-ID: 00:02.0
    chip-ID: 8086:9a49 class-ID: 0300
  Device-2: Microdia Integrated_Webcam_HD type: USB driver: uvcvideo
    bus-ID: 3-6:3 chip-ID: 0c45:671b class-ID: 0e02
  Display: x11 server: X.Org v: 21.1.4 compositor: kwin_x11 driver: X:
    loaded: modesetting alternate: fbdev,vesa gpu: i915 display-ID: :0
    screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22")
    s-diag: 582mm (22.93")
  Monitor-1: eDP-1 model: ChiMei InnoLux 0x14d4 built: 2017 res: 1920x1080
    hz: 60 dpi: 158 gamma: 1.2 size: 309x173mm (12.17x6.81") diag: 354mm (13.9")
    ratio: 16:9 modes: 1920x1080
  OpenGL: renderer: Mesa Intel Xe Graphics (TGL GT2) v: 4.6 Mesa 22.1.7
    direct render: Yes
Audio:
  Device-1: Intel Tiger Lake-LP Smart Sound Audio vendor: Dell
    driver: sof-audio-pci-intel-tgl
    alternate: snd_hda_intel,snd_sof_pci_intel_tgl bus-ID: 00:1f.3
    chip-ID: 8086:a0c8 class-ID: 0401
  Sound Server-1: ALSA v: k5.15.65-1-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.21 running: no
  Sound Server-3: PulseAudio v: 16.1 running: yes
  Sound Server-4: PipeWire v: 0.3.57 running: yes
Network:
  Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi v: kernel bus-ID: 00:14.3
    chip-ID: 8086:a0f0 class-ID: 0280
  IF: wlp0s20f3 state: up mac: <filter>
Bluetooth:
  Device-1: Intel AX201 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 3-10:4 chip-ID: 8087:0026 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 0 state: down bt-service: disabled
    rfk-block: hardware: no software: no address: see --recommends
Drives:
  Local Storage: total: 953.87 GiB used: 10.19 GiB (1.1%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: PM981a NVMe
    1024GB size: 953.87 GiB block-size: physical: 512 B logical: 512 B
    speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter> rev: 15305129
    temp: 37.9 C scheme: GPT
Partition:
  ID-1: / raw-size: 128 GiB size: 124.93 GiB (97.60%) used: 10.14 GiB (8.1%)
    fs: ext4 dev: /dev/nvme0n1p6 maj-min: 259:6
  ID-2: /boot/efi raw-size: 100 MiB size: 96 MiB (96.00%) used: 56.9 MiB
    (59.2%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 51.0 C mobo: N/A
  Fan Speeds (RPM): cpu: 0
Info:
  Processes: 248 Uptime: 22m wakeups: 2910 Memory: 15.36 GiB used: 2.34 GiB
  (15.3%) Init: systemd v: 251 default: graphical tool: systemctl Compilers:
  gcc: 12.2.0 clang: 14.0.6 Packages: pm: pacman pkgs: 1213 libs: 317
  tools: pamac,yay pm: flatpak pkgs: 0 Shell: Zsh v: 5.9 default: Bash
  v: 5.1.16 running-in: konsole inxi: 3.3.21

I already looked at this but found nothing helpful: forum.manjaro org/t/wifi-is-slower-than-my-windows-install/86988
Also tried everything mentioned here: forum.manjaro org/t/wifi-is-slower-than-my-windows-install/86988
File: /etc/modprobe.d/iwlwifi.conf:

options iwlwifi swcrypto=1
options iwlwifi power_save=0
options iwlwifi 11n_disable=1
options iwlwifi disable_11ac=1
options iwlwifi disable_11ax=1

latest helped to get a download speed of 20 Mbit/s which are still less than it should be.

please help D: