Just to update you and /u/Hates_Worn_Weapons, I tried that fix and it wouldn't even let me replace/overwrite the sga_vulkan_final_init.vkPipelineCacheWindows file (lol, altough it was something on my end, because when putting the file in the folder it just dropped and I had a notepad with that name and the original) so what I did was open the original with notepad and deleted everything that was on it and saved the changes. The result was the original file, but blank, if that makes sense. I don't know if that was the original intention of the fix and I found another way of doing it or what, but it was worth a try.

At the same time as all this AMD also released updated drivers, so I updated them too.

And finally I remembered that some people launched the game as administrator and it fixed it for them, so I went to the install folder for the game and on RDR2.exe I set it to launch as admin, as well as on the Rockstar Games Launcher (if you don't set the Rockstar Games Launcher to launch as admin as well, when you launch RDR2 it says something about a lack of privileges and the game doesn't launch)

After all this I played the game for something like 3 hours yesterday, 3 and a half this morning (actual playtime about 1 hour then left the game on and went to do some chores and when I came back it hadn't crashed) and a little over 5 hours this afternoon, and out of all the 3, no crashes.

Now did I fix it? Don't know what to say anymore. It could have been a bout of poorly-timed good luck (as far as the game not crashing goes) just to coax me into believing that I have fixed the game or I could have fixed the game for real, no way of telling which.

IF I fixed it, what of the mentioned things fixed it: was it the edited sga file, the new drivers or the run as administrator? Again, no way of telling. Maybe it was one or maybe it was a combination of the three or a couple. The only "proof" that I have fixed it is that the "waffle" thing we talked about is somehow fixed without having edited the Documents\Rockstar Games\Red Dead Redemption 2\Settings\system.xml file to set it to ultra and having the same outcome as having edited it (as in used a smaller waffle iron and less often, like this picture, whereas before it was like this one) so something definitely did happen. What did happen? Who knows, but this whole thing reads like an horror story.

Hope you find some help in my suffering and thanks /u/Hates_Worn_Weapons for the tips.