Did the matchmaking settings change on halo 5

Did the matchmaking settings change on Halo 5? I typically play by myself but my win % always hovered around 55% granted lately I’ve been at work a lot and haven’t been playing competitive arena as much and I may be a little rusty but over the last couple weeks my win% has plummeted from 55-50 and I’m in danger of going negative. the odd thing is my stats keep going up and up and up. I dont feel like I’m playing badly but I always realize I’m playing a better team 95% of the time. Its very frustrating and its sapping the fun out of the game. BTW I dont really play Warzone so this is about Arena.

You will always be put with better players. It’s a way of the system testing you to see if you are ready for the next rank…

I understand that but I’ve only won 4 of my last 20 games this has never happened before. Not to mention I’m always stuck on horrible teams. I understand that as I rank up the players I’m pitted against get better. It just feels more difficult to win than ever before.