Too much weight for you. Drop to 365 go deep and proper form and up the reps. You wanna compete? Then do it like the professionals approach it. That's so fukin idiotic. Your not engaging all the muscles. It will just give you a false sense and get you injured. Squatting is a compound movement. That means it's using a shit tone of muscles big and small. Your doing an isolation excercise with heavy weight and shit form.