hand 1)
everything is great except for the river. if you want to bet it - you're betting for super thin value. So, bet something like half pot or less, none of this full pot stuff because there are literally no hands that call that you beat. He shoves your massively shown strength, no way are you good here enough of the time to call.

hand 2)
perfect, best board you could hope for without improving your hand.

hand 3)
if he's a crappy short stacker, it's fine

hand 5)
on river -
Basically just bet here knowing in all likely hood he had an Ax hand but also hoping maybe he has 22-66 or something like KJ or K10 of spades
why are we betting then? Ax has you beat, KTs is not possible, KJ and 22 has you beat. You say you know you're ahead on the turn, so why are we bluffing river?

hand 6)
3 betting pre this big or 3 betting at all is pretty bad. Continuation bet is fine, but why are we stacking off? This is so bad it's not even funny. QJ is literally the only hand that we are ahead of that does this. Guess how much we are ahead by? Try 52%-48%

Overall, you are stacking off way too light in these examples. QJ on a JT753 three spade board after a villain shove on river, 73s with middle pair, A2o no pair no draw... come on.