Can't be worse:
1. Takes 5s to load/switch a chat window.
2. The PM of the product must be a dumb - why would people want to open SPREADSHEETS within a CHAT app?
3. When copy and paste, it pastes all the formats from the source webpage, and the user has to spend minutes to clean the format
4. many more complaints...
To sum up, I have never seen a good consumer-facing product from Microsoft. Gmail is so much better than Outlook, Slack is so much better than Teams, Zoom is so much better than Teams, even Google Drive is so much better than Sharepoint (e.g. when you move or rename a folder/file, your previous shared links expire - as they are associated with the file name/location).
I wish our firm can move to G-suite + Slack + Zoom, everything from 2020s instead of 1980s.