[lastchance]

Raise more preflop. 3 limpers = t45 or so, plus original raise of t50 or so. I'd raise to t100 preflop. Somewhat marginal, but it's somewhat important.

Here, with the flop size representing about 50% of your stack, you pick it up with the shove, and take a donk for most of his stack 66+% of the time.

Here, Villain very likely has an ace or a flush here, so I'd check-fold.