Villain is kinda tight, straightforward reg only defending 36% of his BBs (3b 12%). I don't see any hand except his combo of 3s which beat me otf so I assume his range consinsts like 98% of flushdraws and rarely some JT with one diamond.
Turn he improves massively but I still doesn't want to fold my 2pair here, is this even correct?
River is a very good card for me imo because he can't really have any boats in his range and needs to fold a lot of his flushes here right? So I decided to turn my hand into bluff and it will be balanced by playing 33,AK,KQ and some J-High or even T-High Flushes the same way.
From Villains perspective what would be your worst hand you will be calling here?

PokerStars - $0.50 NL FAST (2 max) - Holdem - 2 players
Hand converted by PokerTracker 4

Hero (SB): 126.68 BB
BB: 148.8 BB

Hero posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A 3

Hero raises to 2.5 BB, BB calls 1.5 BB

Flop: (5 BB, 2 players) Q A 3
BB checks, Hero bets 3 BB, BB raises to 10 BB, Hero calls 7 BB

Turn: (25 BB, 2 players) K
BB bets 16.5 BB, Hero calls 16.5 BB

River: (58 BB, 2 players) K
BB bets 37.5 BB, Hero raises to 97.68 BB and is all-in, BB ???

I am probably calling with any 9+ flush, but I may not be checkraising flop with quite as many flushes as some so my range here would be really narrow, I typically would not have another hand I take this line with. I'm not barreling any JT that didnt 3 bet pre on this river. 33 pf for me is villain dependent, not that one combo matters.

what do u want him to fold which is beating u?

@JudgeHoldem1848
Thanks for your answer. So you would have folded your 76dd in this case if you decided to checkraise this flop?

@gambler
His flushes

Tough runout but i am inclined towards a fold on that river, if there's anyway he was x/r Ax and blowing you of a chop otr? the way you described him not likely so he probably had either a flush or a boat either way we are crushed vs that part of his range that he will play like that.

^^^What Ax is realistically barreling that turn that didn't 3 bet pre?

I guess if I had all flushes in my checkraise range at either 100% or some weight, yeah I would probably fold 76s, although that's never in my oop pf flat range, uh maybe I should stop posting now

Given the range you described for your opponent's flop c/r range this is by far the worst turn in the entire deck. Since you called, it may be best to seek additional advice with the search function. We've had quite a few river bluffs like this discussed previously in Heads Up NL. IIRC Samooth started a couple good threads concerning this that should have some solid info for you.

Well you are right I guess. Should have folded the turn given villains tendencies. But ingame I thought something like "lolfold2pair"

Fold river, flop and turn are standard. Would be calling in villain's shoes with JT+.

which part of your valuerange would you fold then? :/

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running the streets!

But ~36% of BB's river valuebetting range should fold to the shove?

No, at equilibrium ~31.15% of BB's river value-betting range should fold to the shove (unless I messed up the math somewhere), but if your opponent over-bluffs in a spot, that number should go to zero. I think people bluff more than they should here, so I wouldn't fold anything I value-bet.