Running bad with KK

I think I'm 1/5 on my KK. Here is the latest (hmm probably should 3bet flop).

PokerStars 5/10 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is SB with Kc, Kh.
1 fold, UTG+1 calls, 1 fold, MP2 calls, MP3 calls, 2 folds, Hero raises, BB 3-bets, UTG+1 folds, MP2 calls, MP3 folds, Hero caps, BB calls, MP2 calls.

Flop: (14 SB) 8c, 2s, 9h (3 players)
Hero bets, BB raises, MP2 calls, Hero calls.

Turn: (10 BB) 3h (3 players)
Hero bets, BB calls, MP2 calls.

River: (13 BB) 6d (3 players)
Hero bets, BB calls, MP2 raises, Hero calls, BB folds.

Final Pot: 18 BB

Results in white below:
MP2 has 5c 7c (straight, nine high).
Hero has Kc Kh (one pair, kings).
Outcome: MP2 wins 18 BB.