You remind me a lot of myself in the beginning asking similar questions. You won't get a satisfying answer this is the way the game was designed and as you can see they don't care about changing.
The game is starting to get stale for me after 2 years and that is because if you play normally, you will have troll results that in my opinion are used to help the predetermined team win. Take a look to your close teams in the league, when I was 2nd or 3rd and the 1st team lost I was happy I was finally going to go close but usually I would also get trolled too.

The other side is when you manipulate the game becomes boring with tennis results.