Your upper back should be tight when you're squatting. Shoulders back with shoulder blades together will create a platform on the rear delts. I totally concur about making the back squat work for you. Doing front squats is great. Hack squats are cool if you can pull them off with enough weight. And zercher squats... Do this with 400lbs, without setting the bar down turn your head and wink at the cardio bunnies gawking at you, listen for the squishing sound of wet underwear. All this is fine, but the back squat is the foundation of a lot of routines with proven records. It works. You just need to practice it.
Post the vid of your squat with a moderate (to you) weight on the bar so the guys here can see. There's probably centuries of combined experience on this forum just waiting for the right question.
My Training Log
Personal tips that I've learned along my still short journey:
Leave your ego at the door.
Prepare. Showing up dehydrated, hungry, and tired will guarantee failure.
Be ready to fight for that grinder of a PR.
Listen and learn. Absorb everything you can, and assimilate that knowledge.
Top Gym lifts: