PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 (t1500)
Hero (t1350)
CO (t1470)
Button (t1345)
SB (t1760)
BB (t1740)
UTG (t1160)
UTG+1 (t4715)

Preflop: Hero is MP2 with K, A.
UTG calls t20, UTG+1 calls t20, 1 fold, Hero raises to t100, 4 folds, UTG calls t80, UTG+1 calls t80.

Flop: (t330) 9, J, K (3 players)
UTG folds, UTG+1 checks, Hero bets t120, UTG+1 calls t120.

Turn: (t570) 7 (2 players)
UTG+1 bets t200, Hero calls t200.

River: (t970) 2 (2 players)
UTG+1 checks, Hero checks.

Final Pot: t970

I think I played this one too passively? I think I should be putting in a 1/2-3/4ths pot bet on the river because I'm losing value?

I don't know, it doesnt look like he has the flush. But I think its best to keep the pot small with a small hand and check the river.

I don't mind it, C/R sucks here as we aren't beating anything that C/R. His hand looks super weak so it doesn't seem like you are getting a ton of calls anyways. But if he has KQ or K10 you are losing a little value. If I think the villain is pretty straightforward I'm betting everytime because he wouldn't go for a C/R on river.

Please bet more on flop.

Yes, this is exactly the mistake I realized that I was making recently. That is a very coordinated flop and you need to protect your TPTK and give draws the wrong price to chase. 250 is about 3/4 pot but you might need a bit more with 2 opponents.

QFT. Bet close to the pot here. Lots of draws out there, so you need to price them out.