Is OTHER wrong in the post ? POST : I've been trying to run a campaign with a group of friends I've known for a few years and one of them kept making joke characters because he is, in his own words, a "noob".

These characters included the "piss lord" half-elf, the unbelievably illiterate dragonborn, and the upcoming orc named Kerhs Eht Ergo(Shrek The Ogre). 

I'm getting tired of this and have tried to confront him about that stated above along with his increasingly bad behaviour at the table. He finds it funny and breaks well established house rules, taking 1d4 damage when derailing everything for more than a few minutes, but the others enjoy him being there and I don't want to upset them.

Other incidents that occur with him typically involve having anyone with the Entertainer background joke incessantly about them being prostitutes, him saying he'd be a better DM without anything to back up this claim, and the player in question throwing his weight around because he owns the discord server we all use for convenience.

I've acted like an asshole a few times when chewing him out and he knows how I feel about this. Even if he does play, I've warned him and every other player about the new material I'm planning on using. It's Tomb Of Annihilation, and I've told everyone that "at least one person might die, maybe" in order to get across how dangerous everything will be in the campaign.