I didn't c-bet here because I think that a big part of their range are pocket pairs and broadway type hands they would mostly fold since we are multiway. My plan was to check call. What's your opinion here ? This is my biggest question about this hand, because if something went wrong then it went wrong on the flop.

Given that it checked through, I suppose betting here for value is fine. I can get calls from Tx, Ax and some FDs. I also expect the pot to be heads up by the river when I bet the turn that's just because of my earlier assumption that they will show up with a lot of medium and small pocket pairs TT-22, some of which have made a set, but most of which will fold here.

Some of the backdoor diamond draws have hit now, and I wouldn't expect him to do this with anything less than a set. I think it's a pretty clear fold.