I did tanked every PUG always in Shield and never got any problem.

Some parts of the day are filled with raging kids that treats everything as it is savage content, sastasha included, maybe you got bad luck and were playing in that hours and got some of them, it happens. You are a tank, so just shrug it off and requeue.

People can kick you out for any silly reason, just don't make it a personal thing and go forward. Requeue is the way. And if you think some inappropriate behaviour happened, just report it and you're done.

You can think about "git gut" when you want go to raiding savage. For everything else, just enjoy the game and don't care whoever asks you to be in savage skill level outside the savage content.