I don't know but I would of called. And here's me theory why.
I do think he has a pair / suited connectors at least he gets the right price for it preflop to call.
On the flop he checks when the board is wet, so if he had something I think his move would be to bet out first.
Now you do you c bet and he reraises you, this strike me as odd.
Then a Q comes and he donks the turn, I say this because I don't see this card making a difference to whatever he has.

So I don't see why you called. I would fold or raise all-in, because in my eyes that's where this hand ends.

I'd love to hear others talk vision about this.

They can play sets this way for sure which is their most likely holding. I play the flop and turn the same way and folding river. Might be closer to calling the river if we did not hold the Ac which gives them several more flush draw combos.

Looks like a fold to me at FR, 23/12 can defo have 56/55/66/A5/A6 here, if they were more agro (going by stats) I may call, but at these stakes I don't give people for bluffing in these spots because they so rarely do.

Pre: Standard obviously.

Flop: I like your bet here for sure and I like your sizing. When we get raised though I do think we should just I be mucking our hand, as nitty as it seems. We have c-bet a large amount in a four handed pot, and we still get raised with two other people to act. A5/A6/55/66 all make a lot of sense here and in a multiway pot like this where the flop comes A high raising your hand with a draw doesn't make much sense. I also cannot see villain doing this with worse for value ever so we're seriously going to struggle to win here more often than not.

Turn: Same as flop, villain is continuing to barrel into us, same logic as above. I don't think we're going to be in the lead here anywhere close to often enough to be making a profit here.

River: Folding is fine now IMO, as mentioned though I don't like getting to the river in this spot at all. It's tough to make these kinds of lay downs sometimes but being able to make them will save you a lot of money in the long run.

The flop call is a typical leak for many micro stakes players. I would even fold this in a 6max game under $25NL against an aggressive opponent.

Micro stakes villains are almost never bluff raising in multiway pots. Here with 4 players seeing the flop and you firing a c bet into 3 other players on an ace high board he's not expecting you to be folding much. The very best situation is that he's on a straight draw but even then his equity is good. Couple that with the fact he's totally crushing you when he is ahead and calling can become a pretty serious mistake.