why are sports rigged for the same teams to win championships instead of teams who never won one before?

Because the rich teams can afford to buy the better players and build better training facilities and that way the same teams are always competing for the top places.
It's like that in every sport , in every country.

I do, and it is the referees and the playing field officials that make the fouls and penalty calls especially in favor of high profile athletes and teams with the biggest television markets.

It may be about money. The ones who win can afford the best players.

It’s the sporting market.