The ranked system has needless grinding.
So my account has like gold MMR. I didn't play in S4 so my account has been hit by 2 soft resets since it was platinum in season 3. After placements I got placed in Silver 2 and I get really good LP gains, so I know my MMR is at least gold.
Well why didn't I just get placed in gold then? It seems like it's set up so I have to play a bunch of games to actually reach the rank that matches my MMR. Then after that begins the actual test of skill where I attempt to increase my MMR.
I dunno, are players fooled by this and think it's fun?