i don't get why you are raising KQo in crappy position but not 88 on the button

hands 1-4 i think are fine. In hand 5 I'm checking behind on the turn because I don't expect a worse hand to call 3 barrels, thus I don't really want to play for stacks. I'd bet 7 on a blank river when checked to and expect a call from an ace like always.
In hand 6, you should probably check and see what develops since there are 5 people in the pot. If there are only 2-3 people in the pot, my line is bet 1/2 pot then 3bet if raised, as long as the pfr isnt a complete station. However, I wouldnt be playing A2s oop with only one other caller anyway.