AK play vs flop check raise

If you did not see anything out of the ordinary: people don't bluff enough at NL2. He showed strength preflop and even after a donk and a call he raises to a small size. I don't expect him to show up with a worse hand than AK here. Just fold otf.

I would 3bet this hand pre.
In general you are not always behind vs flop check raises but when villain does this multiway he probably has a good hand. I think the best move might be folding, calling comes close but shoving here is just bad.

I´m definitely 3 betting pre too. OTF it´s not wise to 3 bet without nuts. I would just call.

1) It's a multiway situation
2) People don't bluff (and we hold a bluffcatcher)

--> Easy fold on the flop

Further, i would also 3bet pre. AKs is a much better call than offsuited, because we can still draw to the nuts if we get into a multiway situation / players behind us decide to join.

The main thing is that he xr mw, so most of the time you will be behind here.
Fold flop is the right play.

I agree with abovesaid - in multi way pots you are usually behind after xr. Just fold and move on