Hand 1 - You should decide where you're at on the flop or turn, not the river after you've called two bets. If you call the turn, you have to call the river here imo since the river couldn't have improved villain's hand.

Hand 2 - Bleh. Against two guys who called a 3-bet, I'd think you're behind a shitload of the time here, so I'd probably check and pray for a diamond (or even better, king ) on the turn, then you can play a flush draw on the turn and squeeze some EV maybe.

Hand 3 - I'd probably raise a little more preflop, but I'd definitely bet more on the flop. Both of these improvements would make your decision much easier here, imo.