3 gay dudes wouldn't be "every male".
And that's the thing, he acts overly heterosexual in an exaggerated way. In TV-shows that's usually a dead give-away. Since you say there's no way, then obviously it would be a surprise.
How much have we seen him do and how much have been talk? Before Episode 9, have we even seen him with any other girl than Heather?
Him having a short fuse is evidence for, not against. In TV-shows and movies, gay people in the closet are most often aggressive, have a short fuse, keep calling things gay, all the bragging, the way he treat women badly, him not satesfyinmg Heather, all to make sure nobody suspect anything.
Again, I'm not saying he is, just that he might be. It kinda fits. But since DPC already had a big reveal he proberbly won't be. Unless it was a way to throw us off. Who knows.