Nl2 full tilt aggressive BB defend

Well, lot of mistakes you've made there. First of all (it's not necessity tho) you could've 3betted him due to the fact most of his hands you simply beat (given you have A as a blocker). Just call the raise otf (donno why you would put there more aggression). You got yourself nearly commited, that's why turn play makes no sense either.

I would call pre, but maybe 3betting is ok. OTF we could play this passively. I would x/c flop but donking is ok too. I think you shouldn't reraise OTF and after he calls your reraise that turn bet is not good.

Nothing wrong with folding pre, you don't need to play A8s vs 1 opponent from the blinds at 2nl to profit.
I definately wouldn't donk that board is reasonably wet and he could have a piece of it, i prefer pot controlling by c/calling and then re-evaluating on the turn, if you dont improve on the turn, and he checks behind, after you c/c the flop you can likely 3/4 pot any turn card and take it away from him. You also have some outs still to your flush if he calls.

I just hate this play. You could go for ch/r on flop or just ch/call. Donking doesn't seem too good IMO. 3-bet flop is the worst possible play, though.

As played, just jam turn.

1. A8s-A7s are at the bottom of calling range vs 3bb open from BU. So we do not have to 3bet.
2. I do not like your flop play. Donk and 3 bet are both not ok. Either xc or xr.
3. As played, thrre is not much you can do and having in mind the stacks left- jam.