It's not justified. You don't kick a noob tank from Sastasha for being a noob. It doesn't matter how much you want to shortcircuit the learning process and force them to understand your advice. If you know how to play, then be patient and work within noob limitations.

All kicking an inexperienced tank does is make the tank queue longer and convince one more person that tanking sucks and that tanking for strangers is even worse.

Commending the whole party would be great. Often as a tank I get more commendations than other players but would rather share them. I usually commend the healer as a matter of courtesy since it's rare that someone stands out specifically. I would prefer to distribute commendations evenly if everyone did a good job. "Commend everyone" could distribute commendations among people who weren't specifically commended. If everyone picks it, then everyone gets a commendation.