Create TWO parallel ranked queues - one for toxic players
So basically, people with (too) many (validated) reports get placed in a 2nd queue to be matched with each other.
The current system of forcing them into normal games doesn't help, it just punishes normal players who want to enjoy the game.
Mixing toxic players to toxic players leads to 3 things: a.) longer waiting times for them (punishment) b.) more enjoyable games for nice players (goal) c.) they possibly feel like they don't to play that kind of people and improve their behavior (incentive)