[nuc1e0n]

I think it's worth appreciating there's a good chance the founder feels threatened by this kind of talk on a regular basis and perhaps they may even be experiencing uncertainty around their own decision making process or feeling out of their depth.

As others on this thread say, it might be a good step for the investors to talk privately with them about the issues involved, and perhaps ask what the founder's own recommendations would be to remedy the situation. There's always the face saving option of buying the founder out if the alternative is the company collapses from key staff quitting. The founder would have doubtless worked hard for the company themselves and wouldn't want to see it come to nothing or get themselves involved in costly legal proceedings.

Such a buy-out might even bring the founder some welcome relief from stress of everything being on their shoulders.