It is funny, that even a Slack Huddle, something that's not even the core of Slack's function, is better than anything one gets with MS Teams. MS Teams is so laughably bad, I think I have never used a worse chat/voice chat/video chat program. Probably not even Skype in its single core days was worse, even though it ate one third of my single core CPU, just to have a call back then.

What is it that is bad about it these days?

In the early Skype days, that tradeoff made sense. Internet speeds across the globe were far from fast so they spent more CPU cycles on compression so they could save on bandwidth.

Zoom + Slack

Do they? Didn’t Microsoft force all its employees back to the office?

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.

Teams is used in the Teams org that develops it in Microsoft yes. Source: I work on Teams free/consumer.

Not to say that the developers working on it are satisfied with it..