If you think Riot would do something for a customer who agreed to Riot's terms of services but calls the company trash while threatening them to change their entire game.
Notice I said entire game, because if they took away this ''high damage'' then tanks wouldn't even have to exist, because everyone would then be a tank.
Dynamic queue, is in fact a bit broken, but Riot and its employees are trying their best to patch it.
Keystones Masteries for champions are just a symbol of power, nothing trash about that.
My conclusion is that you played against Plats as a Bronze who constantly spammed keystone mastery taunts while bursting down your team.