Trios either win or lose the game depending on their rank

Okay so this is just my experience but it has stayed true so far. I am low Plat right now and trios will consist of the following:

1.) Two low plats and one low to mid gold player

2.) Three low to mid plats

The first team has an incredibly low chance of winning. This is good if they are on the other team, but unfortunate if they are on my team. The gold player(s) usually holds the team back and the opposing team gets a couple plat 1 or 2s to compensate while the trio team may be given another gold player. The difference in mechanics is usually apparent and the match favors the team without the trio.

The second team has a much higher chance of winning. To compensate for the premade advantage the opposing team is given two Diamond 5s who are at 0 LP and have lost a majority of their last 10-20 games. I can't say for sure if they are on tilt, but one would think that they might be. These matches, from my experience, favor the plat trio because they have the knowledge and mechanics to work together better than the team with the low gold player(s). If I am on this team I feel as if I am not contributing, and if I face this team I get pounded for making any tiny mistake in positioning or simply just turret hugging.

Riot, I want to play against solo players of similar mmr with the occasional (OCCASIONAL!!!!) duoq. A true soloq would be nice but from what you have said will never happen. I don't want matches to be decided before the game starts based on the trio that is has, but that is honestly what I have seen. I don't know, I may be the only one. I am tired of being a guinea pig solo player that gets tossed around to fulfill the needs of Dynamic Queue. This system in its current state makes me feel as though I don't matter.