What can i do because i hate doing high rep squats every set what exercises do i need to make it harder

How can i fix uneven shoulders cause my arms aren't even when im doing push ups. If make them even it feels like im uneven

Why can't i feel the muscle im working on if i go more than 2 sets

Can i superset pull ups and push ups?

Should i do 2 sets until i can't do it with perfect form failure or 3-4 until i can't do it with perfect form?