Sir, I think it's time for you to go to sleep. Have a good sleep, then wake up, re-read last pages and maybe you will change your opinion.No ban system: Competitive players try to queue in a way to match up with other teams. They leave if they can't, screwing over casual players in queue.
Ban system: Competitive players can't leave matches, solo quo players are forced to play against teams. Screwing them over.
Casual players are screwed either way, the only difference being is the reason that players get screwed when theirs a ban system is entirely on the competitive community forcing a way to play competitively before the game has a actual option for it