He was folding if he didn't hit his draw

[AbZurrrd]

He totally outplayed you:

Holdem Hi: 990 enumerated boards containing 9c 5d 7h
cards win %win lose %lose tie %tie EV
As Ad 625 63.13 353 35.66 12 1.21 0.637
6h 4h 353 35.66 625 63.13 12 1.21 0.363

On teh flop u bet $50 into a $350 laying him 8-to-1 when he's only a 2-to-1 dog. Hence he makes a +EV calls and wins. YOU are responsible for this atrocity. Ewww

Oh wait...