This season game out comes seems to be heavily against me

I scouted a strong team every season and dominated through all leagues and cup in the past
This season I'm losing a lot to much weaker teams even though the playing stats heavily favores me. I watch my games with supporters getting 15% posession and fully rest my players
Really seems like the game engine is rigged
Just lost a cup game 1-2 to some one 43.4% lower and his players have no special abilities

Is there something I can do or is the game engine is completely broken