Hero has been playing pretty tag
V1 is 20s asian man, loose side.
V2 60s white man, tight side


Hero(MP,$300)
V1(BTN:$180)
V2(UTG:$160)

Hero limps with ATo, 6 players see flop

Flop:Th8dAd
V2 bets $8, Hero raises to $25, V1 calls, V2 calls

Turn:Qs
V2 bets $30, Hero??????

Not sure why we didn't shove the turn here. 123 effective into a pot of 117. By only raising 40 more you gave V2 correct odds to draw.

Sure we're a little worried about J9, but I think we get called off by every other two pair. Hard for anyone to have AQ without a raise pre-flop. I would expect mostly flush draws in both players ranges, the last chance to get money in against a draw is OTT.

If we're in LP and it has been limped around to us I am usually raising ATo+; much easier game when we see flops with lower SPR and less than 6 handed.

Limping ATo in middle position isn't TAG play.
What hands do you put V on? Can he have a Q here? Diamonds? Do you think you are now losing to AK or AJ?
V2 has something like $65 left when he shoves river. Not sure if folding is the right play. Pot odds are pretty good. What range do you put V on? Your hand is basically a bluff catcher now so folding is probably right but you don't have any possible ranges for V to help make that decision.
When a tight player leads turn, after the pre flop and flop action, what do you put him on? When he calls your raise, what range are you giving him?
Doesn't seem like you have much plan for this hand, which is part of the problem with limping ATo.

a TAG should open raise with ATo with 6 players at the table.

shove turn.
I think we need to fold here, looks very much like a flush to me

AT limping isn't tag. I'd raise or fold with AT. Preferably fold...

Yeah, I should say I play pretty tight. I didn't have plan and I put him on big Ace. I think this is one of my leak. I should take time before make decision. I'm still new and play my own hand most time.

Grunch.

Raise or fold pre. ATo is not a good hand to play OOP in a multiway pot. Raise enough to sharply limit the field (at my game that would be opening ~12 - 15).

Raise flop bigger. Pot is ~28 counting your call. Your raise puts only 17 on top of that and gives BTN 2:1 odds to call. Make it at least 30 - 35 to go.

Call turn with good odds, but eval river, with a strong preference to folding to continued aggression from V2. A "tight-side" V bet, you raised, then he bet into you again. That's a very strong line. Not to mention that V1 has something he's calling with.

[Including pot sizes on each street is helpful to readers.]

Don't limp.

I would shove the turn instead of just raising. Sucks that the turn hit some of his aces.