I'm with you at the moment with this sometimes with my 7* squad, The game engine just wants me to lose now and again, but because my team is too strong its rare that I get turned over, Last 3 seasons nearly everyone I have faced basically threw in the towel before they even played against me. I'm running low on resources now so I'm likely to play with scouts with power training on 1 or 2 selected players.
Next season, we will not allow any team to get any result against us in the league (except i face scout buyer it could be a problem). We will go 26-0-0 next season with Miku Hatsune.