If one partner is the core of the company, and the others the VC thinks are useless ( I am not saying in this case they were...just that the VC might have that perception) what should the VC do?

After all its just business decisions like Cloudflare recent layoffs no?

https://blog.cloudflare.com/building-for-the-future/

If they truly are useless that's one thing, but the ability to "impress" some asshole in a 30 minute pitch has little to do with running a successful tech company.

With what authority are VCs claiming to be capable of being an accurate judge of talent or character in less than an hour?

Sounds like said VC in your example is doing insufficient due diligence and just investing based on vibes.