Its hard, but it is supposed by this hard as a challenge for players willing to try it early. It will get easier as people learn mechanics and better gear. Although I hate to think how hard this will be on Plus.
I got as far at the 4th boss tanking. There I messed up big time because I am too used from soloing to just reflexively hitting my damage reduction cooldowns if I take damage, and here you absolutely need to save them for Wreck. It didn’t help that DBM was not displaying any warnings or timings for Wreck whatsoever no matter what I did. I thought moving the CDs to a different keybind would help, but then I couldn’t remember where they were in time lol and that was a wipe too. Ugh. I quit at that point and told them to replace me.