[KCD2] Game laggy/stuttery after about 30 hours?

(Warning for minor spoilers about the story/quests)

So as the title says, I’m about 30 hours into the game, and after running fine for all that time it has only now started to lag. The screen will freeze for a few seconds several times per minute, things like opening the map takes seconds to load and is just black, and even dialogue audio repeats and stutters on occasion.

From what I’ve read, some people have noticed this problem specifically in Kuttenberg or after reaching Kuttenberg, but I found it started long after reaching Kuttenberg. Specifically, I first noticed it during the Bellatores quest, during the “Conquer Zimburg” section. I also don’t have the Local Hero perk which some people seem to have problems with.

Does anyone know what could’ve caused this, or how I could possibly deal with it? At this point the game has become unplayable, combat is impossible when I can see the enemy attacking until they’ve already hit me three or four times. I don’t want to have to uninstall or start anew, or god forbid have to give up the game entirely, but at the present moment it’s a waste of time trying to play with all the stuttering. Any advice or information is greatly appreciated 🙏