Well, that was a waste of a year
I spent the last season pretty much only playing teambuilder games because my draft MMR was a lot lower than it should have been from playing with friends between level 10-20. I got my MMR for teambuilder up to where I was consistently matched with plat/diamond players and I could actually play an enjoyable match. Now I'm back to playing with unranked people in draft who take ghost heal on Nasus bot and building warrior on Cho'Gath.