A4s 4bet bluff

For me 4bet is not bad move, sometimes I play similar low suited aces on button vs blinds. On flop I think check have advantages. When we check we get free turn and can hit nuts. In our range are more better hands here but in another side I don't see many hands better fold vs our cbet (maybe JJ-TT which more times go all in preflop than call 4bet without position but KK, QQ, AK, AA similar but I see sometimes how people call 4bet on SB/BB with KK/AA. On turn call is ok we can keep still possible some combination AA/AK too which this hands can fold to raise all in on turn.
Yeah river kills action but still bet.

4-bet bluff vs an active 3-bettor is fine. Also your size is good. His 3-bet size is too small though. Flop I would c-bet 25%, I don't expect him to have many sets, because KK/QQ should shove pre and it would be really bad to trap with those out of position. 77 is questionable. Sometimes checking the flop can be good, especially if he's aggressive and we expect him to stab the turn a lot of the time.

The rest of the hand is standard. Turn we never raise, river easy jam.

I agree with the 4bet as well but dont like your check behind OTF. You want to bet. You could represent KK,QQ,AK. Flop favores your range.

Cbet the flop would be standard. Off course it's tough to give villain to many hands that would call a 4bet and would continue on the flop. Its a good way to win the pot without showdown. If villain would shove the flop you need to call and hoping to hit the flush. I don't expect villain would play a set like this. 77 would fold pre-flop and KK and QQ would stack off pre-flop most of the time. Also defending hands like 88-JJ AQ+ without position is tricky.

Cheers,
SDK1987

Surely the villain with QQ messed up. I would jam QQ vs 4bet every time especially in the blind battles and at these ESS.