This new 2019 ranked system seems absolutely terrible tbh
http://www.surrenderat20.net/2018/04/riot-pls-competition-and-new-players.html
Basically you get a different rank for each role. The premise is that it "rewards players who play multiple roles" but in reality it is the complete and total opposite. Players that play multiple roles now have to climb 3+ times. Why? Meanwhile this is a massive benefit to people who are OTPs or that more or less int if they don't get their primary.
Guess how this system is going to work? Mr OTP is not going to give a single fuck about games that aren't in his primary role. Doesn't affect his main MMR or LP right? Now you get a shit ton of people who legitimately give zero fucks about winning the match they're in because it doesn't matter. You will get a shit ton of people who couldn't care less what their support or offrole rank is. Oh, but YOU are on your main role with this guy. At least with the current system they will actually try to win because it affects them just as much.
For the love of God Riot PLEASE don't do it. Do not subject us to another year of Dynamic Queue level of trash. People who cannot play more than one role do not deserve to be at the same rank as people who can.