Why am I the one that has to wait?

Why is it that someone can troll and even tell others they are doing it and I can not leave the match w/o a 5min punishement. What is wrong with this RIOT? Do something about it now. Stop ruining champions and start actually making a real change. At champion select you should be able to vote 3ppl majority to stop the match. Without a 5min wait. Without a message about "because you abandoned a game". You are punishing your player base and rewarding bad people. Gross.