Ranked is incredibly demoralizing because of my winning/losing streaks.

Seriously, IDK what is going on.

I never can win one, lose one. Every time I play ranked, I will win 5-6 games in a row, and feel really good about myself. I get into my promos, win the first game. Play the last two games of my promos. Lose both. Then, after sleeping on it (so I don't tilt myself), I lose the next 4 games in a row. I did WELL in some of these games too. I roamed bot to help. Bot didn't use my help, they fed anyway. Jungler was fine, but bot basically lost the game for us in the first 2, and the enemy Akali got fed in the next 2.

Why does this happen? It's incredibly frustrating when you get so far only to be sent all the way back down just for a 50% winrate average.