These rule implementations are not detrimental to you, they're to make the game fair for managers of big countries. As I told you before, in the Spanish D1 or the Italian D1 you won't see a team finishing the season with a 22-0 as you did last season. So if you had the stadium in equal conditions, with the same number of seats and the same prices, at the end of the season the spanish winner will have won less money than you, because he will have lost some matches that will have affected to their attendance negatively. Even being as good manager as you, the spanish winner will still win less money than you because the Spanish D1 league is much harder than other D1 leagues of smaller countries.
The problem comes when the winner of the Spanish D1 arrives to the BBB, and he sees that he has won his national league just like you, but he has less chances to win the BBB not because his is a bad manager, but because he plays in a much bigger country and just because he's from a big country he had less income than you, so he plays in disadvantage against you. So to keep the competition fair, the income of bigger countries must be increased to make it similar to your income, so they can compete in BBB in equal conditions.
About the supporter thing, I don't know what you mean with the Spanish cat, because if I translate it to Spanish or Catalan (wich is my natural language) it doesn't make any sense to me. But what I wanted to tell you is that from my point of view if you buy the game you have some rights that you don't have when you support it, and I think that when you support it you can protest if something doesn't work, but you can't not reproach them about anything. But that's just my opinion.
And by the way, I wasn't asking you why you're or you are not a supporter.