Was injured/out of form at the beginning of 2015/16 season, never got along with Benitez, apparently his behaviour rubbed some of the dressing room alpha dogs wrong
Then Zidane liked/likes isco more, then Casemiro made himself untouchable, no feeling between James and Zizou, Zidane found a setup that worked and chose to stick with it, etc...
Basically, the problem is only one manager in the world could have made Modric, Kroos, James and the BBC play together and make it work, but Florentino sacked him
James was our second best player in his first season, and it was close, despite Cristiano having a 61 goal season. He was incredible. I think he'd instantly be one of the 3-5 best players in the league in england, germany or italy. He was already the second best player in france at monaco, behind only God