Security aside (because that’s my employers problem), Teams is just aweful.
The UX is all over the place, likely because of the feature creep forcing a lot of dev departments to collaborate.
It just does too much. I don’t need an all on one solution, I need a communication tool.
The chat looks like WhatsApp, not like a proper professional comms channel. Maybe there’s a setting buried somewhere.
The meetings are more miss than hit. For every working meeting I have 5 meetings where something doesn’t work. Multiple retries to join; or it picks the wrong mic, speaker and/or camera; or chat within the meeting doesn’t work for some participants so they can’t share or see links; video streams being disconnected and reconnected depending on who currently speaks (which looks extremels annoying); and probably a ton more I zoned out).
Slack on the other hand mostly just works. As a chat tool. What it is supposed to be.