Please, just take on Starting Strength or another Beginner program, DO NOT CHANGE ANYTHING, eat your ass off, way more than 2000 calories and sleep at least 8 hours a day. These programs have been built by experts, which you are not, so follow them! I was just like you, doing way too many isolation exercises. I am now on Starting Strength for two weeks and have already added 50 lbs to my squat and 50 lbs to my deadlift.