I tried to install Pop! and broke my system and really really need help if anyone is willing

Hi I'm so sorry I don't mean to be a bother or force anyone into unpaid support, but I'm having a full meltdown and if I can't fix my system I'm screwed. I really thought I was doing it right and installing Pop to my second D drive to leave windows alone but somehow it completely broke Windows and I can load into that, only Pop! And unfortunately Pop! I guess isn't really my GPU (Nvidia 1080ti I think) so on my 4k monitor everything is blown up and the wrong aspect ratio, cutting off the bottoms of windows I Pop! so I can't even navigate this system that I'm 100% entirely unfamiliar with. I don't even care about getting windows back at this point if I can get Pop! usable, I just need a usable machine. I've tried some terminal stuff I've read online already but nothing has worked and I'm afraid to do the purge ~nnvidia command because it said it might turn my screen black and if I can't even get into Pop! then I'm screwed. I don't even know what help I need but I desperately need help

Edit:

I'm too stupid for this. I don't understand what anyone is saying, nothing is working. I don't know what to do. I need to stay away for a few because if I don't I'm going to kill myself. I'm very sorry and I appreciate everyone's help, I wish I that I was smarter and I wish that I was stronger.