Keep at it. They're out there. Rev (rev.com) was fantastic for this in engineering. I'm currently at the Predictive Index and we effectively have a "no dbags" rule in the culture. If you're not nice or you're not helpful, you're not going to last. It's something we're really focused on keeping as keep growing. It's a hard problem, maintaining culture as a company scales but I'm really hopeful at least that one facet stays around.
I wonder if it's something you can weed out companies for during interviews. I imagine you could iterate on some questions for the interviewer that, assuming they didn't lie, would give you a pretty good indication of this "safety" factor. Something like: "Can I go up and ask anyone a question about what they're doing?" It might rely on you speaking to real employees. I imagine if you're speaking to some very HR-y types, they might just be focused on saying "yes" to whatever question you have.
I wonder if it's something you can weed out companies for during interviews. I imagine you could iterate on some questions for the interviewer that, assuming they didn't lie, would give you a pretty good indication of this "safety" factor. Something like: "Can I go up and ask anyone a question about what they're doing?" It might rely on you speaking to real employees. I imagine if you're speaking to some very HR-y types, they might just be focused on saying "yes" to whatever question you have.