I was playing 33/28

No HUD, no clue.

What do you think about my oop TB?

River action?

Poker Stars, $0.50/$1 No Limit Hold'em Cash, 6 Players

BTN: $109.38 (109.4 bb)
SB: $98.50 (98.5 bb)
BB: $102.72 (102.7 bb)
UTG: $135.08 (135.1 bb)
Hero (MP): $124.01 (124 bb)
CO: $149.40 (149.4 bb)

Preflop: Hero is MP with K Q
UTG folds, Hero raises to $3, CO calls $3, 2 folds, BB calls $2

Flop: ($9.50) 8 9 Q (3 players)
BB checks, Hero bets $6.80, CO calls $6.80, BB folds

Turn: ($23.10) 2 (2 players)
Hero bets $16.54, CO calls $16.54

River: ($56.18) K (2 players)
Hero bets $40.23, CO raises to $123.06 and is all-in, Hero ???

again calling is an exploit. w/o a clue about his tendencies i probably fold bc my range is uncapped and my river betting range looks like this (from top to bottom):

JTs
QQ, KK
99, 88
KQ
Q9s, Q8s, K9s
89s
KTs

so you are pretty much in the middle of your range so that folding wouldn't be exploitable.

your hand looks like 2pair +, dont think nitty stars regs would try to bluff you off them, or are even capable of making such moves.

fold.

easy fold

Your hand looks exactly like it is, dont think these people are capable of turning pair+SD into bluffs often enough for this to be a call. Fold.

your range is uncapped here and you're almost never getting bluffed (i'd take the under on 5%). couple that with the fact that there's not even much of a chance anyone at these stakes even value-shoves KQ here (much less anything lighter), and it's a super easy fold.

River fold seems fine. Nitty note, I'd bet more on the flop because of the texture and it being 3 handed.

Ask yourself what hands he can bluff with here? It's alot of pair +sd type hands that might be raising flop more often. Without any info this is a turbo muck.