>> decided to not have a Rust Foundation ED, meaning Chair has outsized power in the Foundation
> that Amazon "marginalized the core team" (but no details)
That seems like details to me. It's also extrapolated on elsewhere here.
> That's two out of three grievances that have no substance whatsoever. You cannot have a serious conversation about these things if there is not more detail.
Actually, you could, just by ignoring the things you don't see evidence of and focusing on the points that do, and assessing them based on merit.
The messenger is irrelevant if the message is verifiable and is worth discussing. It's useful to call out points that seem to not be backed up, or be purposefully vague. It's not fine to use that as a reason to ignore other points because "you cannot have a serious conversation" when that's obviously not the case when it's not tried.