It should take about 20 matches or less to give you a decent rating, what games have you played that took longer?

Anno sure is great, sadly it’s not on a platform I’m willing to play on.

Why do adults watch other adults kicking a ball?

Because it is or was their hobby and it is fun to see other people do stuff that you like. Some streamers are very skilled so it’s similiar to sports, others are entertaining like podcaster or comedians.