You have a much bigger stadium, much more money in the bank and a much higher squad value - I can understand exactly why you needed to resort to such graphic language and abuse when contacting support (this is said with extreme sarcasm)
Your opponent has a squad that is 3.5% better than yours. Get on with it.
And don't abuse people just because it isn't a walk in the park for you to win your league. As other posters stated here, the higher you go the harder it is to have a league made of the same level teams and your situation is far from the worst