Low MMR thought.
Thinking that Riot has an specific code when you're in promos that matches you with certain people may be odd.
But i think there is some kind of conceptual bug with players with low mmr.
When i was in gold, i had a decent win ratio, matchmaking was decent. Games were fair and there were little stomps.
But since i reach Plat, i started losing more games since i'm not at the level yet. I'm okay with that.
The problem is: My mmr went down, a lot.
Theoretically, i should be playing with people with same MMR and games should still be even, or fair.
But in the practise i cant find that. I think that because i'm Plat the matchmaking system matches me with people with similar MMR (~gold 3) but against a team that is "slightly" better. The other team is "slightly" better because my team has me a "plat player".
So, me being bad for my division cost me to be matched with a worst overall team and makes it really hard to maintain a decent in ratio.
Not only that. Also, because i have low mmr i lost more lp than i win per win or loss.
It really feels like "Elo Hell" not because "OMG, MY TEAM SO BAD I'M STUCK". But because the matchmaking system rankes me somewhere i'm not. I should be considered a worst palyer and that would make teams more fair.
That's only my opinion, though. Please if you're going to comment with "That's because you're bad" or similar, please i beg to stay quiet.
I hope i made my point clear, i usually dont.
By the way, DC's doesnt help.