Hand 1: I think your 3bet size pre is slightly too big, its nitpicky but i think it makes a big difference. As played seems fine, I don't really prefer c/c down to c/r all in here. You may want to c/c and c/f river?

Hand 2: Seems fine to me, not sure what I do vs a shove, I probably call.

Hand 3: I think c/cing the flop here is far superior to leading.