In a way that no matter how much you dropped your quality, you would never meet managers more than two levels below you?
two lvs above is still too high. Imagine that if that team has some 6* players, they are 8* for you.
1 level above is more fair
* I can say here (from my experience in the Cup/ played a lot of games) that a 6* team of a manager 1 level above you, is much more difficult from a 6* team of a manager 2 lvs above. The second, is a 4* team for the manager, meaning that he is not interest much for his team, not very active, not enough sources (condition/morale of the players).

Also want to say that t11 it's just a game based on football but there are many differences from real football.