How many 50s do you think there are in MCC? Who would they play with if they could only be matched with players 45 and up?
How many low level players do you think there are in Halo 3 on Xbox 360? Who do you think they get matched with? Players like you, just like in the MCC.
All I'm saying is, that a ranking system should match you according to skill. I don't know how that's a problem?
It's not the players fault, that the MP in MCC doesn't work as intended and unexperienced players shouldn't be punished, by playing against really good people. They should get the chance to get better, by ranking up and play with people similiar to their skill.
Maybe +/-5 ranks isn't ideal, but Halo 3's ranking system was nearly perfect in terms of matching people according to skill. I never had games, that ended 50-15 in ranked. It just sucks that Halo has become a brainless dongfest, since Reach.