Matchmaking Problems?

My friends and I have noticed a matchmaking inequality that's been a bit frustrating for us over the past few games. I haven't played ranked for two years now, and I've been playing with two Silvers consistently, and we've usually had good matchups (mostly Golds and Silvers) until the past few weeks.

Over the past two weeks or so, we've noticed that even though we're still ranked pretty low, we've been drawing in games vs. Platinums and Diamonds, while being paired with teammates who are still in Bronze. This would be fine if it happened every now and then, but we've noticed that it's been happening pretty frequently, and we've been getting blown out of the water in games for the past two weeks.

Is anyone else having issues with matchmaking? PLZ HELP