true skillbased matchmaking

i have started to see that the matchmaking is starting to get rigged after wining some games i even made it so that i would only at max match against +50 elo but still get players that are 300-500 elo above me and that the current matchmaking system doesnt represent the skill of the player but rather how many times they won for example a 2000 elo player could be matched against a 400 elo player if they both have the same elo or are in range of the same elo in a diffrent gamemode therefore not accuratly displaying the true skill if the player but rather a twisted form of a sorry excuse of a matchmaking system that doesnt match based on the player skill but rather on wins and losses he had in this gamemode i say it in different terms lets say you are the highest rank in 5vs5 but the lowest rank in 4vs4 then it is simply not fair for the players in the lowest rank to be matched against him because he is of much higher skill than they are and just because he didnt play the 4vs4 which made his rank the lowest his skill dosent disappears thats like saying if magnus never played blitz it would be fair for him to be matched against true 100 elo player