[Isura]

Hand 1: Fold this preflop. I don't defend with QJo from the SB. BB is a different story if it's folded to me. You shouldn't fold the river.

Hand 2: If you raise the turn, it might be better to fold the river, unless villian is a real donk gaybettor. I might also call down from the turn onwards.

Hand 3: I'd check-call the river.