Update 2: I was able to scoot the thing and see the label on the other side. Its a "Channel Well Technology GPS600S-X 600w" Full of chinese lettering and all. Most definitely the culprit of our issue.
Update: The thing is stuck in the case lol. I can't get it out. I also can't see anything that would give away what brand/model this thing is. This means I can't replace it either.
Typing this on a separate computer so sorry for the formatting issues.
The thing is, I don't even know what my PSU is. I would have to take the thing apart to see it. It's 100% not like a corsair or anything, it's like, prebuilt pc cheap.
I'm gonna try my best to put everything on the table with all the "evidence" of my pc being a little funky. About a year ago, I upgraded my old 2019 prebuilt pc with a better CPU, (a Ryzen 3, 2300x to a 5600x) and a new GPU, (gtx 1650 to a rtx 3070.)
Everything was great, with games and media...