Well took me a while to get back here but hopefully I can give some helpful advice. First, we really do need a video. It is so hard to coach yourself when you are in a spot like you are that it helps if you can get some objective look from the outside. Second, this is not a weak squat for a woman so hats off to you, and third, you need to look at following a written program for your squat. The problems you write about--feeling stuck in a plateau, not going anywhere, are most usually attributable to not having the right technique, mental game, or exercises in place.
If it is technique related, videos and coaching fix that. If it is mental, that's on you. If it is exercise selection related (i.e. you are not addressing your weak points or your program is wrong on volume or frequency or whatever) then following a well-designed pre-written program will help you keep on track because the tendency is to aimlessly switch things around when you are stuck without any real pattern or plan to the changes. This isn't just you, this is everybody, even coaches--Dave Tate got John Meadows, John Berardi, and a bunch of other people to write his programs for a while because he was stuck and as he writes "a retard about training myself". If anybody knows how to coach, it's Dave. So it's not that he didn't know his stuff, but that it really helps to get an outside influence to take a look at your programming to give you a mental break from banging your head on a wall--go mindless, just follow the program :).
If you are actually hitting depth and actually have solid technique, not criticizing but there's no way to know without a video for sure, then the problem is your program is not addressing your weak points, or your volume/frequency/intensity is not matched up.
Can you write everything you do on all leg days in a week?