This isn't a situation I have experience with so I can't offer qualified advice. It sounds really difficult and frustrating. My general advice is when you find

This isn't a situation I have experience with so I can't offer qualified advice. It sounds really difficult and frustrating. My general advice is when you find yourself at odds with someone, remember that the two people who most need compassion in that moment are you and the other person. That just means recognize the suffering you are both going through. Also, recognize the suffering that the other people at the company will go through if things continue along the current path. That's not meant to engender dread or anxiety. It's just a way of cultivating awareness and compassion.