The amount of players between Seeker IV and Initiate IV makes up about 5% of the entire playerbase of ranked, and both are above the 90th percentile of all players. The difference in the average skill of players from one rank to another is negligible outside of Eternus.
What you are going through is what nearly every single person who's played a competitive online video game has gone through. If ranks matter to you, the only way anyone has ever consistently been able to climb the ladder is by improving themselves. Sometimes you will have teammates that are much worse than you, and sometimes your opponents will be much better than you. But I'm sorry to say that, in the majority of your games, this is not true, and there is no miracle patch coming that will suddenly give you "the right team". The only way to win more is to recognize the mistakes you make and think of what you could've done differently afterwards. There is always something you could've done differently. If it helps you to know, I'm Oracle III.