2-5 (500max) game, this hand is straddled to 10:

I have 420. Cutoff has me covered
I raise to 40 w/ KsKc
Cutoff calls, straddler calls pot=130

Flop: 9d 4d 2h
Straddler checks. I bet out 70. Call, call (pot 340)

Turn: 4h
Straddler checks. I bet 130.
Cutoff takes some time asking me how much I have left (180- I know that if I am going to bet here I should have just shoved). He hims and haws for a while, then just calls. The straddler now folds.


River: Kd
I shove my 180, cutoff insta calls with a set of 22's. I show my trip kings. Then he proceeds to give me a bunch of shit about how I had no idea where I was in the hand with only 1 pair. The guy who folded later told me that he had a diamond draw.
Yes I luckboxed into a K on the river. The thought of someone having a 4 occurred to me on the turn, but the more likely hands seemed to be a flush draw or some kind of A-9 or T-9 suited type hand with a set always a possibility.

Any thoughts