The false is under the FREEDRIVER, but due to lack of formatting is hard to spot that
> Installed PCI configs:
--------------------------------------------------------------------------------
NAME VERSION FREEDRIVER TYPE
--------------------------------------------------------------------------------
video-nvidia-450xx 2019.10.25 false PCI
Now you see what i mean. 
@Rioluu - let me correct a few things on your config and see if that helps, plus i will ad a few other things to try. I’ll get back with something.
Edit:
Here is a corrected /etc/X11/mhwd.d/nvidia.conf to try:
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "LG Electronics"
ModelName "LG Electronics 32inch LG FHD"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 61.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce RTX 2080 SUPER"
Option "TripleBuffer" "On"
Option "ConnectToAcpid" "Off"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "nvidia-auto-select +0+0 {ForceCompositionPipeline=On}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Extensions"
Option "COMPOSITE" "Enable"
EndSection
Section "InputClass"
Identifier "Keyboard Defaults"
MatchIsKeyboard "yes"
Option "XkbOptions" "terminate:ctrl_alt_bksp"
EndSection
Since you added the Option "TripleBuffer" "On" in the Section "Device" then you also have to make the use of the kwin.sh file. Run from terminal:
echo "export KWIN_TRIPLE_BUFFER=1" | sudo tee /etc/profile.d/kwin.sh
Reboot and if that doesn’t help, then modify /etc/profile.d/kwin.sh to be like this:
export KWIN_TRIPLE_BUFFER=1
export __GL_YIELD=USLEEP
export __GL_MaxFramesAllowed=1
The use of metamodes can’t be in both sections of device and screen as you had it. Anyway, if you have a working system now, with that conf file, make a backup of it before using mine, so you can restore it and use the system.