Form looks OK to me except for the rolling of the bar.
As for programming, 5 lbs increase in 16 weeks sucks. I used to train like that and made progress over the years but always felt beat up and usually ended up lifting less in a meet than in the gym. I have switched to conjugate and the first time I ran it for 12 weeks, I got 50 lbs on my conventional. Heres how I programmed it along with the squat.
DE day - Comp squat with 46 lbs of band tension - waves of 24 reps, 22 reps, 20 reps (12x2, 8 x 3, 5x5, etc) at 50, 55, 60 % of raw (knee sleeve) max.
Deadlift with 46 lbs of band tension wave of 10 x 1, 8 x 1, 6 x 1 (60, 65,70%)
Hip hinge movement (RDL, SDL, Good morning) for 30 total reps
Leg curl variation for 40 total reps
Max Effort Day - rotation of Manta ray hi box, hi bar pause squat and deadlifts to 3 diffierent block heights 4", 3", 2" all for max singles.
Supplemental movement - Squat or deadlift variation
Last heavy deadlift 21 days out, Last heavy squat 14 days out, last heavy bench 7 days out
The last three have squat days I suspended the bar from the rack with bands and did 2 weeks of triples and one week of singles.