Speak softly and carry a big stick. VCs constantly talk about supporting entrepreneurs through tough times, enabling creativity, building amazing companies, etc. They're not lying -- they really believe it, and it's an important thing for them to believe. But while they say all this stuff, they're also human. And humans follow their incentives. They do that before they do anything else. So your job is to make it easy…
The only thing I can add: At the beginning of a relationship, everybody is kind. Background checks not just help, they are essential, do them.
Getting into conflicts and power plays with VCs, or just any person at some point, should be expected but there are still huge differences in how people deal in messy situations in terms of morale and ethics. You will find everything between feeling uneasy and facing a nuclear war.