Maybe some teams win repeatedly because they know how to hit the scoresheet, teach their athletes good technique and consistently work towards improving themselves. This, in turn, draws athletes from all over to learn from them, and it feeds the cycle. I wonder whether you've actually sat and watched Dance Worlds and compared Pace Elite teams to other teams - there is a reason why they win, and it's because they're GOOD, and not because they're from a specific state, or that the competition is rigged.
I find it ebbs and flows - you'll have years when a team (a.k.a. Smoed) is seemingly untouchable in terms of technique and difficulty, and then slowly others will catch up, and a new team will "take over", so to speak. I feel like this season is a 'catch-up' season, where everyone's difficulty is catching up to each other, and no competition has a clear winner. Some competitions favour difficulty, others favour technique. You just have roll with it and put out the best that you can on the floor. If that's not enough to win, smile, be gracious, go back to the gym and work out where you can improve. Simple.