OP, I was gonna post my own thread or in a CBT but it looks like you kinda have the same problem as me. I'm wondering specifically if it's due to squatting entirely too much.
Background: I've been lifting for >4 years (started 18, now 22), but non-seriously for most of that time. Started with SS and more or less stuck with it because it was simple, consistent, and hit all the major compounds, but mainly also because I never got to 1/2/3/4 or thereabouts. So I've been pretty much stalling at the following weights since T+6months after I started and using the jim as just my steady exercise routine rather than a conscious progression thing:
All in lbs for 3x5
115 OHP
155 Bench
245 Squat
285 DL (probably could do more but idk whatever)
I have been drinking & dipping (baccy) harder than ever on the weekends, all this semester, BUT I can recall multiple times when I was hungover like "fuck it, I'll go to the gym" and had a great lift, way better than midweek. SO I think the problem might not be so much that I'm not getting enough rest (by drinking & drugs & staying up late) but that I'm stressing out my lower body too much with squats EVERY SINGLE WORKOUT. Only reason I think so is because my form has deteriorated a lot over time, it feels harder & harder to maintain a symmetrical load across the hip flexors and such in both legs. Plus I tend to feel pretty good when I take time off, which has lead to me skipping the gym a lot more recently if it's convenient. I still feel good after I lift, especially deadlifts, but squatting is hard af.
Is this literally just because of the SS squat meme? Should I switch to something, anything else at this point? I literally only today thought "most experienced lifters don't squat every single workout" :/ and that that might be part of my problem.