Corporate venture is really a very different beast from financial investors and each corporate VC group is itself sui generis. As an entrepreneur, it's important to understand their deliverable - it's not always financial, as this interesting interview makes clear.

One useful question to ask to understand a corp VC's deliverable is where they report in the parent organization. If it's to the CFO, it's usually financial return. If it's to BD, it's deals. If it's R&D, it's to explore areas the R&D org is unwilling to spend its own $$$ on.

There are exceptions, of course. And blends. But I've found this to be a pretty reliable guide.

As to non-corp VCs, their sole job is to make money for their LPs. You don't have to like that, but it's not hard to understand. And the sooner you internalize this principle, the more rational and predictable their behavior becomes. Which is good for your sanity.