Of course you should try to adapt to a new workplace and its processes. I can't understand how you'd have a different opinion. Coming in as an outsider and tryi

Of course you should try to adapt to a new workplace and its processes. I can't understand how you'd have a different opinion. Coming in as an outsider and trying to lead some sort of office revolution is sure to backfire. The OP's situation is unfortunate because they didn't choose this workplace themselves (as their startup was bought), but "not being compliant" seems like a poor solution to the problem. Quitting seems more reasonable.