EHM The Blue Line

Has anyone experienced a player always unhappy with his training?
I have a young defenseman who was a RD and I always train them to learn LD and vice versa.
He did learn but he always complains.
After he learned LD, I change him to a standard Defense that I edited.
He hates that.
I then created a Light workout.
He hates that.
I tried him at LW thinking maybe he hates defense
He hates that too.
I guess next stop is resting.
This feels like a bug that a player would essentially reject all forms of training.

Maybe he's still angry about the original training to learn LD. I would just put him on regular training, and then wait for him to stop complaining.

I tried to place him on regular training and he remained unhappy.
I placed him on resting and he shut up
I'll try regular again next season.