thats just what happens, people will play just about any 2 cards if they wanna see a flop, and then once the flop helps them (straight and flush possibilities for them) then they can't get away from it, plus it looks like he had both of you covered so I don't know if it was only like 1/10 of his stack or what to call cause he probably figured both his draws are good if they hit... straight flushes do happen though and it sucks when its against you