Should I quit now?

[deadfromsuckouts]

Every flush draw hits. Top pair top kicker no good. Top two pair no good. Lucky monkeys hit everything. But i silently slowly see their chip stack diminish against others in the game. I am in slow motion now. I have k 9 of spades on the button. flop comes k 7 4 . mr minus $700 bets, I raise (vulnreable hand in a mutiway pot) turn 5
meanwhile i keep betting...river 8 (rainbow) I bet mr -700 calls. I feel good about this 9 kicker is good in this pot.
KING NINE I SAY! about 30 seconds later he says king eight. He slow rolled me=but seemed confused. I walk away from the game. Emotions. Was that a good move on my part?