Easy 3 bet spot sb vs button open, folding suited connectors to a button open is super nitty, calling is bad because he's gonna have to play out of position and he gives the big bling a better price to come along, meanwhile a 3b gives him the opportunity to take the pot down there and then.

His cbet is fine, he has good equity but is out of position with 8 high so again taking it down would be nice.

Seems super weird getting shoved on from this cbet, if you were villan what would you perceive your range as being when preflop you bet-call then over shove the flop when as villan you block diamond and straight draws.

Anyway congrats you got your money in ahead now stop being a results orientated whiney bitch and learn what variance is