Can’t put muscle mass on legs. Please help!

I’m not sure why but I can’t seem to put any mass on my legs or glutes. I train legs about 2-3 times a week depending on how sore I am. I do squats, leg press, leg extensions, weighted lunges, hamstring curls, calf raises, and a couple other exercises. I do three sets of 10 reps at 150 lbs when I squat. (And don’t come at me saying that’s a bitch weight because I am a tiny 5’3 female). I know it’s not an issue of not taking in enough protein because I track protein intake and have gained a ton of mass on my arms, chest, back, pretty much anywhere on my upper body. It also sucks because I want to have bigger thighs and butt since I have tooth pick legs. And I’m really starting to look unproportional comparing my upper to lower body. Could it just be genetics? Am I screwed lol

Should I just take steroids? (Jk)

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