Could be legit #3: Locker room discontent
Have you ever had a job where many of your fellow co-workers were unhappy? Maybe they didn't feel they were being compensated enough, or that the manager in charge was ruining the company, or that they should be given a more prominent, prestigious role. In any event, it's certainly not pleasant to be around a lot of grumpy people at work.
Now take that phenomenon and magnify it by about ten times, and that's what happens when people are unhappy in any pro wrestling federation's locker room. Discontent can breed more discontent, as wrestlers compare notes and rile each other up in very negative ways.
A former WWE writer just went after JBL for his comments HERE
The same thing could be happening to Dean Ambrose. Perhaps the general locker room malaise has gotten to him after so many years with the company. It's well known that talent like the Revival and Dolph Ziggler are unhappy, and their unhappiness might be contagious.