Sounds like a group i was in a while ago. The most vocal speed runner kept insulting the new guy, who didn't know the fights that never got explained, saying he must have bought his character on ebay. I've never initiated a vote kick before or since, but damn did it feel good to get rid of that toxic player, right before last boss too.
Thankfully, most groups i've been in have been good to new players, especially if they say up front they have never been there before. They ask if they want to watch cut scenes, and that they don't mind if they do, just want to know to be careful before pulling boss before everyone is ready. They explain boss fights, go slower, etc.