I hate mine too so I know the constant self criticism lol. I had to do a lot of mobility work before I could use them properly, day to day construction life they were fine.
I found squats didn't actually grow them and neither did lower reps and heavy weight.
Now I start with mobility work and warming them up good, I might walk backwards or do some light reverse step ups too, lateral leg press single leg or lunges for a warm up and maybe one light set of something that the next exercise targets so if I'm doing belt squat I will do a less intense set of leg curls so some isolation already occured. Then I stick to using hack squat, belt squat, lay down curls for hamstrings. I keep it under 9 sets in total after warmup.
Not sure if that helps you. Pendulum squat is probably great too. I don't know anyone that actually was able to build good legs with squats in person.
Your legs don't look bad at all though and that's not even taking your age into consideration.

