Unbalanced matchmaking

I have no idea why this always happens. For instance I play war zone a couple games and it’s a good match up with no xp or rp boost and usually come up with a win. Now every time I use a high rarity boost like victory for example all of a sudden my team becomes total crap and enemy team is all decked out and tears apart the core in less than 5 min… anyone have this bs happen? I literally just lose all mood to play halo. I don’t leave games and I don’t tk so wtf does this bs keep happening to me. This is not the first time… I’m going back to bf4 where at least teams get balanced.