@anornymorse I am aware. I happen to also host the Pleroma instance I'm posting from.
I know the Matrix team blames the users for using the service instead of fixing their problems, yes. This is by no means a new account, though. I've had it for years. Even if it were, it is absolutely retarded to keep registration open for all, and then blame the users for registering. Especially since not a single Matrix room is as active as the average IRC channel I'm in, and I seem to have a great response time there, and they're on way less (financial) resources. Clearly, it is very possible to make a chat system that's fast when there's over a hundred users. Only Matrix seems to fail this incredibly low bar.
Lastly not blaming the protocol for "the mistake of centralization". I'm complaining about a bug that doesn't let me use a feature they make me use, in this case, invites for a private conversation. Nice evasion of the problem, though. This is why nobody takes the Matrix people seriously.