yes
the problem is that the matchmaking system only has so many players to work with, once it cant find that perfect 4 gold5 vs 4 gold5 match it starts to work its way through the second best, third best, fourth best, and so on
eventually you end up with 4 gold5 vs 1 gold5, 2 silver6, and 1 bronze9 or something, simply because that was the fairest matchup possible with the available players - the alternative is waiting potentially hours with no opp if you're "too good" at the game