Useful would be "these are deficiencies in the federation system which should be addressed by doing this, that, and the other".
Useful would be "here's a guide to routing your client's connection via Tor or running a homeserver behind Tor".
Useful would be "let's start a project to enable use of Matrix without these things we think are bad ideas".
Useful would even include "here are well-thought out criticisms of Matrix with suggestions on alternatives that don't have those issues, but have these other tradeoffs".
This post is anti-useful. It's just FUD.