When you go on a huge losing streak it obliterates your elo. You're getting 14lp wins per game and more with losing because your elo is a lot lower than what it should be as a Plat 4 player.
Don't play ranked for awhile because your going to get on teams with people that are tilted, lost a lot, and are angry.
Also stop playing ranked if you lose two games in a row because you'll get grouped with tilted angry nerds yet again and it's just not worth the risk.
That's just something I noticed in ranked... The more I play on losing streaks the worse off I get and I always get grouped with more and more r%%%%%s.
You'll need to go on a pretty strong win streak to balance out your elo and start gaining respectable lp again.