Poisoned chalice.
You have a bunch of aging players that want to rule the roost, a board that meddles, success of a the last few seasons that you can't hope to replicate with the resources at hand, a need to improve on last seasons awful domestic performance despite the fact that the best player in the world who averaged over a goal a game for the club is gone and no money to spend as the previous manager threw most of the transfer and wage budget away on players they simply did not need (Courtois, Mariano and Vinicus at a cost of over 92m)
Every top manager in Europe that hadn't had the job (and some that already have like Zidane) was offered it and laughed.
If he manages to finish second and nab the Copa Del Rey he might last until next season. That's probably best case scenario, though.