Firstly, is the whites of opponents a lot higher than yours? If so, 20% advantage is not a real advantage at all.

And then, on-paper 20% disadvantage is definitely bridgeable, and not difficult at all. With the right formation and orders, a proper perfect defensive counter setup team can get a draw quite easily and a win when opponent attackers are on form.

And plus, money has very little to do with winning any match at all. That 8% additional possession bonus gives just a few percentage advantage, and actually in your case none at all when you already have so many supporters already. Paying managers have their additions of rewards, but not so much for the match itself.

Defeated once doesn’t mean always defeated either. Each match is played on its own - even if we beat the same opponent 9 times already does not mean automatically we would win the 10th time. The odds of an upset will only increase when there is always a possibility of a certain troll match when the engine ‘disabled’ our best attackers and make opponent GK a superman - it is up to managers to find a way to deal with it in-game, be it subs, formation + order changes, player line removal, etc.