The key is to not even bother with your team except once at the start of the season. I have a second team, which is Lvl 8. I have won 4 leagues, 2 cups and 1 champions league. The stats aren't even close to yours, Lucian's or my main team, but the team wins trophies despite not doing anything. Team benefits: 0%.
Player preparation 0$. I don't even train them. Despite all of this, I am still in the champions league with that team.

Game is a disgrace.