I'm divided on this subject. On a side I understand that the game shouldn't make the best team to win 10 out of 10 games but at the same time when the difference is to big this kind of results shouldn't happen.

Personally I wouldn't like to compare reality with Top Eleven cause is basically like the developers would say: Even if you invest 10.000$ you can still lose vs somebody who don't care to much and invested 0$ because you know, things happens.

Once the difference is notable there shouldn't be any doubts on who's the winner, unless there's a major issue like playing with X number of injured players, 2,3 red cards in one game, super low condition and moral and so on.