So after updating using the pkcon update command earlier today, now, after starting my pc again and letting it update, it booted to a black screen with a white underscore in the top-left corner. At first I thought it was bricked since there was no mouse or keyboard input (tho num pad and capslk worked fine), but typing blindly my password booted me into the Plasma just fine. I tried switching to other login screens beside Breeze, but all do the same.
I am still not technical enough to know how to deal with this kind of problem beside main troubleshooting steps and few I found on the kde webside and forums, but none that I found worked.