Mark–
It is more effective to pick a max of 3 things to address at a time.
Sounds like you need to smash above your knee.
You are a system of systems so improvements in other areas will have am impact on your knee.
A few days working with an area may be needed.
You should squat to check in with where things are at.
Have someone look at your squatting technique.
Have you done any box squatting?
It could be a technique issue.
You should continue to working out. There are several other elements you can use within your workouts.
Post 400: Movement Hierarcy- Movement Complexity, Injury Rehab, and Making the Invisible Visible