Weight 230#, Height 6'5"
I guess it's less impressive given my size but I try.
I have arthritis in my right knee so I'm trying to progress slowly. Might start trying to add linearly again at 5lbs a week. Once my core feels like the weak link(long torso) I back off weight progression and work on adding reps.
don't sell yourself short, you are giving your all and that 's what matters.
Sorry to hear you have a bad knee too, I've noticed that warming up properly before squatting goes a long way. I spend 20 minutes just stretching and warming up my legs on leg days. the worst for me during summer was doing to much cardio (jogging), that didn't help my knees.
I am down here at 5'5 156# at the moment, currently preparing for a proper bulk until my Birthday on December 22nd,
You tall guys have it hard with the squat, is a long way down and form tends to not go as smoothly or intuitively with longer lower body parts, from what I see in my gym.