The real issue with new champ select/dynamic queue
QQ post @riot 
With having support in either "primary" or "secondary" ends up with u going support ~70% of time or so, you'd have to either be a support main or really not care about not being able to play ur main role to put support in for either of ur roles, this turns into a vicious cycle where less people put support in as roles theyd play, which results in the poor souls who did put support into secondary to likely support, rinse and repeat. However another glaring issue that hasnt come to light is the fact that alot of ppl like to put mid as a secondary so they can get their primary role, with mid being possibly the most contested role right now. This leads to people who main mid to have to compete with them for spots in the matchmaking, which means that mid mains will get their roles less often than any other main. Coincidentally im a mid main whose second best role is support so im actually super salty about this.
TLDR; ppl who play support but dont main support and those who main mid get screwed by the new system, AKA me.