First of all, I'm very new so I apologize in advance for any mistakes, overlooks, etc.
I flashed Kali Live 2020 to an USB flash drive using three different methods, all three yielded the same result. The latest one was using Rufus 3.7, adding a persistent partition.
When I start Kali for the first time, everything works as far as I can tell. Second time I start, a green screen appears after the logo. If I leave it enough time (till the screen goes off) the login screen eventually appears.
Then, it works very slow and with graphical glitches. I tried to capture screenshots but they come out fine, so I took a pic with my phone.
I also tried using balenaEtcher and manually creating the persistence partition, same thing happens, as well as using MiniTool Partition Wizard (I have a Windows 10 system). I used different media and it didn't change anything.
This doesn't happen if I don't create a persistence partition.
I also updated my BIOS (Gigabyte AB350N) to the latest version, same results.
I also tried installing amdgpu-pro but wasn't able to.
Any help would be appreciated!