Never sleep again!
I'll try to make this short. I'm in gold 5 (solo/duo) and was almost at 100lp at some point until about a week ago I start just losing my ass off like 2 out of every 3 games. My last game I had 1 lp left and my mmr is about silver 2 or worse now. There is a little tilt but also matchmaking is fucking ,me.
Seriously, matchmaking will make your games increasingly difficult if you have a lot more wins than losses. There is a discussion here. http://boards.na.leagueoflegends.com/en/c/gameplay-balance/AByipKfh-tired-of-win-day-lose-day
So I play a ranked game and the difference in decision making, my team vs theirs was like night and day. We just got stomped, it was hilarious. Pretty much if you have more than a 54% win rate you are very likely to lose hard early and all of your wins will have to be dramatic comebacks that they could make a good inspirational movie about.
After we lose I'm thinking "hmm, G5 1lp they might just demote me to silver 1 or straight to silver 2 witch would be fucked up because I'm in handicapped matchmaking mode atm. Here is where it gets interesting "you have been demoted to bronze 2"
True story, can you believe it? I was relieved when I realized I had accidentally played a flex que game. Imagine if you thought you had gotten demoted 7 divisions even though you have more wins than losses.
tl;dr I thought I got demoted from G5 to B2 but realised It was flex que not solo/duo