Dorian didn't squat.
Squating is by far the best exercise you can do.....period, although with the right routine leg press can be very nasty as well.
Try leg pressing a weight you can do 20 reps with some difficulty and do it for 50 reps.
Pound out 20 reps with no rest, then lock out and take 3 deep breaths, then 5 more, then lock out 3 deep breaths and 5 more, continue until you get through to 50 reps.
Two sets is all you'll need and walk out of the gym you're done.
I'm all about form, so knees in armpits throughout the set.
my 2 cents