I don't think your, or my own experience is a relevant sample size.
People are dicks, people get fired for insubordination all the time.
Don't take this the wrong way, because this isn't meant to directly attack you but rather it's a general sense I get about everyone who blames Breslow for this. But it feels to me like people just don't like Breslow for a whole host of reasons and therefore it's easy for them to just blame Breslow here too.
There's plenty of reasons to justly critisize him, but I think it was Cora's job, not just as manager, but as someone who could have done it in his native language and had an easier conversation to follow.
Cora was the one who told the media Devers was "his 3B" while openly campaigning to bring Alex Bregman into town who was his boy. So he caused this mess. Raffy also had some choice comments about playing the outfield that sounded very rude in the midst of his teammate sustaining a seasons ending injury. He's not a team player. They are all to blame, but to me the order goes 1. Devers 2. Cora 3. Breslow