I had similar problems too...
Last season i bought a MC scout with playmaker ability who should have been awesome yet every game was 5's then 4's then other players who had been performing started hitting 5's and 4's too... i ended up having to sell the MC whom i had paid real money for... crazy!
My team had a terrible start despite being the highest rated team in league and only just qualified for champions league on the last day of the season.

This season i have added 3 new scouts to my team and again they are not performing.. am being beaten by and drawing with teams 5-15 stars below me.. they have no scouts no special abilities low stars and the managers dont even watch the games whereas i am always there to adjust my tactics if things aren't going well... almost all my team are scout players and my tactics worked fine before with 7 leagues in a row and 3 champions leagues and a cup too.

Anyways its driving me crazy so am not going to be investing in any more tokens in future as something appears to be broken here.... Scouts shouldn't be worse than regular players! Yet this poor form from these players is affecting my results very badly!!