Is there anything we can do different in the following hands?

Hand 1:

Effective stacks 130 bb

Calling station from UTG to 0,60
Hero raises from SB to 2,40 with AA

FLOP J8Q Pot 5,00

UTG checks
Hero bets 3,75
UTG raises 8,50
Hero pushes all-in
UTG calls.

Our opponent has JQ and he wins the pot.

Hand 2

Effective stacks 100 bb

Our villain is one of the regulars.
Hero raises from the btn to 0,40 AQ
BB reraises to 1,20

FLOP 8A8 Pot 2,90

BB checks,
Hero bets 1,45
BB calls 1,45

TURN 8 5,80

BB checks
Hero bets 2,90
Villain raises all-in

I suppose we do not have to be worried about being behind, we have (almost the nuts) the nuts? Well, villain shows AA and wins the pot.

HAND 3

Regular raises from the UTG to 0,60
Hero reraises from the BB with JJ to 2,40
Regular calls 2,40

FLOP 458 Pot 5,00

UTG checks
Hero bets 3,20
UTG raises to 11,25

I think it is too early to fold on a single check-raise on the flop.

TURN 8

UTG pushes all-in
Hero folds

The opponent pushed instantly, it was so fast that he did not even have to think about our hand strenght a bit. I think he is extremely strong here, but I still think about my decision carefully. At end I fold, because I think we are crushed most of the time.

Maybe these are just coolers, maybe not.