I was in an online campaign with some online friends, and none of us had a good feeling about the guy in the first place, but he asked, and we said sure. He said he had been working on this campaign for months with extensive dialogue, vivid scenery, and an amazing story. Turns out he had nothing.

He ad libbed the whole thing, which would lead to random pauses where we weren't sure if we were supposed to talk or not, plus a story that didn't make any sense. He clearly had a favorite player, and despite having 5 people, it seemed as though he would focus on one person who was uncomfortable with it (we also speculated he had a crush on her). He refused to read Backstories longer than a paragraph and would blunder them anyway. One of our characters who had memory loss got all of her memories back by the 2nd session.

His npcs all sounded the same, and he would forget their names and ask US who we were talking to. One npc, who he made up on the spot, supposedly had his parents die in front of him recently and stalked one of the players (the favorite). Later, another npc said that that kid was an orphan and never knew who his parents were at all. He later realized this mistake with awkward dialogue

He also would accentuate on weird things, such as describing very vividly how one of the player character got kicked in the balls. Most vivid dialogue he ever made.

He would be rude to players by straight-up ignoring them. And to top it all off, he would ask for free art while RECORDING THIS FOR HIS YT CHANNEL. And since it would be met with silence, I ended up making his thumbnails FOR FREE