I actually don't think the problem will get worse with age.
Again
You have an already injury prone player seat on the bench for 2 years, 1 of those years being an extended covid season, then come back with a short preseason due to covid, to a physical league, I'm actually glad that he has been good and somewhat available.
Hopefully copa America gets canceled and he can focus the summer in his fitness and conditioning. He will be better next season. He will always be James, but this season was always going to he the toughest in my opinion