Defending against draws

Originally Posted by Openside

We aren't a dumb jackass if we are the villain in this hand.

If villain has 45% equity and we pot the flop, pot odds to call are 33%.
pot odds = equity = 0 EV
pot odds < equity = + EV
pot odds > equity = -EV
Somebody please correct me if i'm wrong.

You're wrong because you aren't taking into account the future betting.