dynamic que

i like getting adc or mid everytime. however when i get adc i often have to waste my ban on ezreal or some other troll support pick like karthus. because the support spot wants to be an ezreal support or something as eqully stupid. can we bring out a way to kick people out group before you enter matchmaking like team builder. i liked team builder because if someone said ezreal support you gave em the boot. the next support would come around and hopefully be a legit choice. if i chose bot lane carry then went some with bs like taric as my pick people would throw stuff at me. there needs to be a solution sooner than later. i shouldnt have to dodge to avoid trolls. post solutions if you think you have them.