Catalina 10.15.6 Graphic Glitch

Hello everyone!

Yesterday I installed hackintosh (Catalina 10.15 after that updated to 10.15.6). Everything seems fine until I try to play couple of games.

When I run a game, no glitches spotted but when I start a video on youtube (Some music) or friend shares screen in discord it starts insanely glitch.

Tried many things like:

How I installed Hackintosh:

Mounted Catalina on 32GB USB flashdrive through transmac in Windows, booted up erased my SDD to Mac OS Extended, and whent through all instalation process.
Installed Clover Configurator

Here are the photos of PC specs and graphic glitches:

iATKOS | United Kingdom