I think you’re a bit too sensitive: It’s just a video game. I also got kicked as a tank during my first Dawn-run, and after I got kicked, I opened a dungeon guide on the internet, so I can see what I did wrong. It seems like I was too squishy to do the second last boss without having weakened it enough. Afterwards I knew I either need better gear, or clear the mini-bosses. I opted for better gear, and my next runs were all smooth.