i was going on a win streak then suddenly my last 2 games my teams have been complete shit

Riot has a system in place to make sure you do lose games.

You sure it wasn't you? Last 4 games 1/5/4 alistar, 4 assists as the support? 0/12/9 you point and blank fed this game 3/12/31 pretty good here with alistar 2/4/0 with skarner. 0 assists tells me you never ganked also you fed a little here and for never ganking you csed horribly The rest of your match history is even worse than this. It wasn't your team i can tell you that

Yup, it's how the elo system works, if you go on a win streak and still carry, still win you will jump a lot. Last season I only played around 100 ranked games, started in silver 3, won some lost some, around silver 1 went on a win streak, got into gold and never lost a game jumping from gold 5 to gold 3 to gold 1 and after skipping gold in its entirety pretty much I was getting worse and worse teams but little more IP every time I kept winning. At one point was getting around 44 a game. So just look at it like this, sure your on a win streak, you will get slighty more stacked odds against you, but if you win you get rewarded.