Preflop: looks fine
Flop: We could bet slightly larger on this connected board.
Turn: The opponent does seem passive although weaker Kx hands may play like this (KQ comes to mind) and rarely KT. We lose to KJ (possibly only one combo that's suited), 33 and JJ (and players like him slowplay sets a lot).
While going broke here might not seem too bad a lot of these passive guys will rarely raise you with bluffs/semi-bluffs or for thin value (Like KT or even KQ). So I believe that we are a bit too optimistic thinking that we will be ahead a lot here.