hand 1: not really a bad fold, there are better spots to pick but is he the type of player to c/r flop with big aces? If not, then calling turn is probably okay and evaluate river. I'm not sure though if 4-bet/ jam flop is a good play here.
hand 2: im calling. weird line for A-x, K-x.
hand 3: Agree, cbet K73 board.