Ya I am going to try and not diagnose that too much in regards to purely weightlifting metrics, but my first thought is that if you can't clean more than you can power clean you either lack proper mobility, comfort in the front rack, or some sort of stability/imbalance issue. Your clean and jerk is pretty inline with your backsquat (outside of the fact that it is power), but your deadlift is far outpacing your clean and your squat by a solid margin.
Again though that wasn't really your main question so I don't want to spend a ton of time diagnosing weightlifting imbalances, it is just an interesting tid bit since good weightlifters tend to be great squatters.
It does possibly open up some potential reasons that could help start you on a path for what could help your squat. I'd probably look at things like front squats, mixing high bar in (unless you already do that predominantly) and pause variations (of regular or even in combination of the before like paused front paused high bar...).
Typically I follow up my working back squats with front as an accessory, although the past couple weeks I didn't so much so perhaps that's explaining the approaching plateau I'm at. I far prefer lowbar squats, but am willing to throw in high bar as an accessory of course. Pause squats really are great. I think last week I did
low bar working set 5 reps at 280lbs
low bar pause squats at 225lbs with 3 second count in the hole.
I was up until the past few weeks going:
lowbar working set
cleans sets of 3-5 working up to maximal weight
finishing with fronts.
lately I have also worked in good mornings, rdl's, and lunges.
I think those are having solid carryover to the deads but you're probably right. maybe I need to focus on more front squats to build my back squat.