Riot needs to fix the match ups

It has been 5 times now i go in my promos to gold and lose them because I get afks or it's an all silver 1 team vs gold 2 and 3s, which in my opinion doens't make sense. I feel as if when i am not in my promos i win 85% of game and when im in my promos i win 10% because the teams are unbalanced and unfair, according to the ranks. It doesn't make sense for me to be playing against all gold team with gold 1s inside them and im silver 1. 0 balance and im sure a lot of people have that problem too. This makes people quit league. Everyone with the same MMR should be playing against each other, not a high mmr with a low mmr because it's not fair to the high mmr because the low mr can feed a lot and make the one with high mmr lose their game. RIOT fix it because it doens;t make sens that I go into promos 5 times now and can't get to GOLD because the same thing keeps happening to me.