Why did Travis kill those men?

Travis wanted to have sex with them, but he can only have sex with dead people. You are lost sweetie pie, and with you, it's more than likely a permanent condition.

You definitely missed at least the last 10 or 15 minutes of last week's episode.

The Bros wanted to kill their friend because they thought he was gonna turn, but Travis said their friend wasn't dying, he just needed rest.

That's when Brandon challenged Travis to a freestyle battle rap, winner take all. Travis revealed himself to be quite a capable battle emcee, landing several hard punchlines on Brandon, but Brandon was a virtuoso on the mic -- his flow was magnificent, his rhymes was tight, and his disses were just too much for Travis to handle.

So Chris, disappointed that his dad was beaten so easily in the battle rap contest, decided to ditch his dad and go with The Bros, and Chris died when he got into a car crash with The Bros.

It was all quite tragic.

those two bro idiots showed up at the hotel, without Chris. they killed Chris , so Travis beat the bloody pulp out of them

I was hoping beyond hopes that Travis would end up dead in that scene and then Chris would bust through the wall like the Kool-Aid guy, weep a few tears over his pussy of a father character and then start high-fiving cast members and saying, "Alright, Season 3...Be THERE! OH, YEAH!!". And mugging to the camera...

Sounds like you missed the first of the 2 episodes this that were shown, ep 14 & 15.