The third hand is fine.

In the first hand you need to raise somewhere postflop. Given stack sizes I wouldnt mind a raise on the flop and then pushi9ng the turn when checked to. As played on the flop I push the turn.

In the 2nd hand I really dont like putting in such a small 3bet if we are just going to fold to a raise. I wouldnt mind a call of the minraise and then a c/r AI on the turn or just betting the turn and pushing the river [or calling a turn push]