In my experience Teams is great for calls (both audio and video), horrible for chat. I guess because it's built on top of Skype codebase? (just a guess)
The chat portion of Teams is so very poorly designed compared to other corporate chat systems I've used.
I mean even copy and paste doesn't work correctly. You highlight text, copy it and Teams inserts its own extra content in there. That's basic functionality and it's broken.
Or you get tagged into conversations and with no way to mute them. For a busy chat that alert notification can be going off continuously. Of course the alert pop up has been handily placed to cover the unmute icon in calls, so when someone asks you a question you can't answer them.
Teams feels like a desperate corporate reaction to Slack with features added as a tickbox exercise but no thought given to actual usability.
I never thought that Slack or the whatever Google's chat system is currently called was in any way outstanding until I was made to use the dumpster fire that is Teams.
It's a classic example of where the customers, corporate CTOs, are not the end users of a product.
But it's out of the scope for this discussion.