Because Respawn tried too hard to create "fair" matches across the board, which ended up only satisfying the people who were the least likely to put in effort / continue to play if they weren't having a good time. Like I said in another thread, SBMM tries to solve the problem of creating a fair fight between your butt naked average joe, and a literal bear. For premades, it's 3 average joes, vs. three bears. Considering that a majority of the playerbase can't hold / reach a 1.0 K/D ratio, it's pretty safe to assume that a lot of people simply aren't good. Random matchmaking is the only truly fair experience IMO.
