I'm not sure, really. I know that I met the requirements and that it worked (in my limited experience) very early in EA. I'm unsure when exactly all of the changes were made. Then, too, they've made some performance improvements in more recent patches. At one point, when I first noticed that they had changed the requirements, it was really unplayable. I don't meet the current requirements, but, outside of the looting issue, it seems to play reasonably well now. I've been afraid to go very far in, as I expect that I'd encounter more problems. I was rather hoping that older patch versions might be available here, so that I could test a few of them.
Hmm, if it was worse a while ago but slightly better now, I suspect rolling back to patch 6 won't help much. That method to manually install older versions might help. If you knew when the requirements were changed that might help narrow down the patch, but I could imagine it was right at full release.
What about game streaming services? I don't know much about them, or which ones would let you play BG3, but if you want to play it and it doesn't work well on your PC, that might be a way round. However, you'd then be paying a monthly fee instead of buying a one-off upgrade. Up to you, of course