The matchmaking problem

That is exactly how sbmm should work. You don't deserve hundreds of easy matches just so you can play with your less-skilled buddy. Truth is, friends of disparate skill should not be playing together at all, but if they do then the game should match them into lobbies based on whichever one of them has the highest skill. As a matter of fact, I've never played a game that did it any other way, and they do it that way to prevent exploitation. I'm not saying you personally are trying to take advantage of the system, but I don't really care what your motivations are if I'm legit silver in a match with multiple diamond tier players who are using the excuse that "they should be able to play with their scrub friends." Just no.