have != of

Thinking that people who play much higher have no clue how to play against donks is one way to ignore perfectly good advice. Most of your money at any stake comes from donks, so you better assume they know how to play them.

Why did you bet the turn?

If you're going to c/f when you hit your draw then obviously you shouldn't be calling to draw in the first place here. He made a perfectly reasonable value bet IP after you two checked to him. I don't see anything strange about that. His minraise on the turn is incredibly bad though.