[Hack]

You're not an idiot for calling it but I don't think you're good here most of the time. Anyone with two diamonds, an 8 or a king beats you. Players like to play kings. It's rare to see someone cap with less than two pair here, and even two pair beats you.

I say you should have folded after the MP2 raise instead of calling two cold. I think you could have saved those 4 river big bets.