I feel your pain. It took me 2 years to win my first one. I played many semifinals, 2 finals lost by penalty kicks and many other times I've been eliminated way before with troll results. I still remember when I rage quit because a much weaker chinese opponent scored like 5-6 goals with the same player shooting from 30 meters (at least what the commentor said).
To win one I had to use the exploit, I tanked for a few seasons and got lucky draw and then I won 2 in a row.

But it was frustrating and not fair at all because I could win leagues and Champion's Leagues without using any exploit.