I’m sure the people who designed Teams and Meet use their own products on a daily basis. And if those are crap, what’s a better alternative?
That doesn’t sound like they have faith in Teams themselves.
I use Teams every day and it can’t even do threading in channels properly. The spellchecker is unreliable and even copy and paste is occasionally patchy.
It is not a good product. I’d switch to Slack given the choice.
Not to say that the developers working on it are satisfied with it..