They are all at it , DISNEY ILM SONY FOX DD, finding a way to get the same product out at less costs, they all up the quotas, hire new grads, mentor and train them up to speed and open the bomb doors on pricier senior staff when the show wraps.
Get over it and bring your A game every day at work and blow your clients out of the water everytime you go to bat.
Dont be loyal to anyone but yourself and prepare for that next job the moment you get in the door , whether its up the ranks or at another address , because be assured the employer has already laid out their plans for you before you even started.