It is unfortunate, but it is because the queue is new so everyone's MMR was kinda low on it. I don't think they based it off last season's Solo Q MMR I think they based it off of last season's Ranked Team 5's MMR. This is the nightmare that Solo Q would be if everyone was reset to Bronze 5 every season like some people request. By mid season it will start to balance out and next season it will be pretty balanaced. Right now it is not a competitive queue and you have to play it with the same mindset that you use when playing Normal Draft. Honestly it doesn't get any better as you climb the ladder. I hit Diamond in it and still don't get quality games. Sometimes I have silvers on my team against challengers and it feels unrewarding to do well because you know once mid to late game comes around it will be a stomp because of objective control and team fight mechanics.