I'm surprised to see such a narrow view about this issue on this forum.
The company was acquired, (and that in turn), when the new parent tried rolling out new contracts per employee, with a short turnaround to sign. Among other things, the new version basically would have prevented me from working in my field for a year.
I told them I needed time to have it reviewed by my lawyer, and I did too. Sure, the backlash had them rolling back the demand forthwith, but it convinced me that the ideal time to leave was immediately, under my old contract.
This forum oddly has some anti-labor sentiment. It is seen in this thread and also in threads related to unions, where the tone is quite obviously anti-union.
Me, I'm very anti-union in that I never want to be part of one, but OTOH, I fully support their right to exist as simply the collective extension to the individual members' right to bargain.