If you solo Q you get some crazy games where a lot of times you are matching 3’s and 4’s but thats not even the problem. The problem is that the game puts people in on teh solo Q team with a mix of people around the other teams rank and others who are a lot below the skill level of everyone else in that lobby so it literally turns into 3v4 matches in ranked. Its not even that persons fault for being put into those lobbies where they are being completely obliterated.
Feel free to leave any questions in the matchmaking feedback thread in the matchmaking forums, Dr. Menke can give a better explanation of what is happening if you link up a few games