Constant mismanagement of projects, timing and resources. (any huge company will have this to some degree)
Company is entirely unsure of what it is, what it wants to be and how to get there. When I joined, this was not the case.
Get ready to work after hours most days as people will constantly force work on you when it suits them best. This wouldn't have been an issue had I known I'd never amount to anything at this org.
I worked here for almost 3 years without ever being promoted but was "celebrated" as a productive employee. YOU WILL BE LIED TO ABOUT YOUR CAREER PROGRESSION EVERY TIME YOU ASK.
Don't come here looking for tangible career progression, join diligent for the work experience. It's like McDonald's.
Company just spent over a billion dollars just to inevitably fire the employees of the acquisitions a few years down the road... Ask me how I know...