Yes, Matrix has massive issues
Yes, XMPP has massive issues
Yes, IRC has massive issues
Yes, Revolt too has massive issues

Funny thing about using that as a reason to use corpo messagers is this; those all have massive issues
I could sum up the problems with any of those foss platforms in a couple sentences, with Discord or Telegram I will be listing issues for almost half an hour.
Again, it’s about compromises. They all have problems, but the corpo stuff has the worst of them