Current system pretends the team is a single player with the rank of an average of individual ranks. So that way they can apply this system which is a poor man’s take on the 1v1 chess ranking system, where it makes perfect sense.
To me it is INSANE I got no rank movement when I, as gold1, outscore 5 onyx players, just because my TEAM, as a whole, was EXPECTED to beat the other team. Pure BS, IMO.
In chess, it is 1v1, so EVERYTHING is about winning or losing. Here, there is individual intra-team performance to consider, especially on teams with a wide range of ranks/skills. Hiding behind “duh, your team was expected to win” is being lazy.