Against a UTG raise, they shouldn't have too many Ax hands, mostly higher ones, so less hands that might hold on despite being weaker.
with J and A on the board, it's quite likely that someone already hit the flop usually.
So, what are our draws? I would only count 1 draw- T. 4 outs.
Our Q and K are tainted here. it's quite likely we will already be behind even if we hit one of them. In a multi way pot, that's even more true than in heads up pots. They're not real outs in such a case.
So the draw is very weak.
If I knew these players were very loose, sure, then I might add weak aces to their ranges against a UTG raise and these might actually fold here in such a multi way pot where they might be beat already. But without such knowledge of the players, we have a very weak draw and are trying to bluff a 4-way pot with a flop containing 2 cards that easily hit their ranges.
Bottom line regarding the flop: in a 4 way flop, betting against 3 players with a bluff on a wet board tends to be a bad idea. In my opinion, not much of a semi-bluff, since we don't even know if our K and Q will be good at all, so only 4 outs.
Check/folding or check/calling seems a lot better here depending on the action after us. It's just a spot that's usually very bad. If the board was not so wet...
Turn: Good. You got lucky and got the best possible situation - the pot became heads up, and you got your draw. Nothing wrong here.
River: I just don't understand what bet this is.
Is this a value bet or a bluff bet?
If it's for value, there should be a worse hand that will call.
With the strength you've been radiating during the hand, Do you really think many Ace hands will call here? Any hand that isn't a flush? I don't think so.
You're representing a hand that destroys any ace hand on this board (your play makes sense with a straight, a set, and an aggressively played flush draw that hit. Even JT would give you two pair... Ace hands cannot call here.
JT is too far behind as well.
The bigger sets such as AA and JJ might be the only worse hands that may call here, because you can also have a weaker set or two pair with JT, but they are also very unlikely based on the lack of action from preflop to river from this player, and are also too small a part of his range.
So I don't think there's much of a value bet here. Could be, if you had reason to a specific read based on previous hands pointing to a very passive player playing AA or JJ that way. Then you bet smaller. Otherwise, there's no value bet here IMO.
So - is it a bluff bet?
That would mean there should be stronger hands that fold. Tougher spot, and IF this bet is any of the two, it would be a bluff, since weak flushes may sometimes fold. Though here, I think flushes are only a small part of your represented range, so it shouldn't work.
I would c/c this river.
You still lose to flushes, but at least now you induce the weak pairs / ace hands to bluff (they should know they're beaten, if not exactly by what), or probe (if they're not sure, also two pair hands or sets), so you win more than in the actual line chosen.