I just don't see the problem with getting stuck with 4-men premades in ranked
Despotic? Get them banned. Ignoring your input? Get them losing, then win with a more responsive set of people and leave those guys behind you. Forcing surrenders? Again, fine, that means they lose more than you and you'll leave them behind.
The problem with Dynamic Queue is that you can't be "top or support" because then you're just support. Support, no matter what.
If I put support as secondary role, my queue lasts 0.25 seconds. So little that my pc lags from the animations.