Gross spot!

Couple things I like that would make your decisions easier on later streets. First off, no reason not to cbet imo. By not cbetting you are taking over pairs out of your range and inviting draws etc.. If someone makes a play and you got to fold then no big deal, you did not risk much of your stack and you have a good image of cbetting.

Second, as played on flop, I think you either got to go with it on the turn or be willing to fold to several river cards and possible river shoves since we have minimal info. Reason I say that, his pot bet on the turn shows no sign of slowing down. He could definitely be pot betting the turn with a hand he wanted to c/r flop with. There is no river essentially that would be great for u minus a couple cards and there is a flush draw on board, plus the board is scary vs sb and bb calling range. Again, cbetting on the flop alleviates a lot of this imo.

I am little bit confused by your responses. I tought this is easy decision not to c-bet because:
a) In step tournaments we want to conserve our chips to later stages because we have huge edge in push/fold game.
b) Against calling stations, which I expect them to be (they flatted few hands preflop before this hand) it is tough to get folds on this flop texture. I don't know what their calling range here would be. They can flat with any pair, any draw, sometimes overcards…

c) I have some showdown value.

I know that if I c-bet and get raised here I can comfortably fold and that would be the case here probably, but generally I still don't see c-bet being profitable here. Are you c-betting here often/always? Maybe it's my leak, but I am almost never c-betting this structure against 2 opponents with this hand.

Anyway I would be also happy if you response to what should I do here since I didn't c-bet. For me it's still gross spot.

ok the game changes a bit as you stated (i didnt realise that this is a step STT)

you're right that our chips are very valuable later in the game and for this reason we shouldn't get it in early unless we're pretty sure we're way ahead

as played – i think it's a bit weak to just fold when we hit our turn so i'd call once and then re-evaluate the river

once he committs to the river it's an easy fold for you

just as you said – there's too much value in preserving our chips for when we have an edge later in the game AND we have only one pair to an over pot river shove which is almost always the losing hand

I doubt he has KJ and this is very unusual to be a busted F draw imo