I think Top Eleven is modelled more around the EPL, rather than La Liga, where any team can beat any other team on any given day.
Each team will have good and bad days, and thats a part and parcel of managing a club in the game and in real life.
Heck, even Barcelona lost 4-0 to PSG in the Champions league and teams have won Champions league parking the bus with very little possession.
But, that being said, I have noticed a lot of vague results since the last update, esp. in league and association matches.
Might be related to the update or just a small sample space Im looking at.