We regret that you will need to wait to experience the full richness of Microsoft Teams features on Linux such as background effects, reactions, gallery view, etc. Please go fuck yourself until we decide it is ready.

The current software is on par with the current web version, which for me is OK. Yes, it could be better. I am glad it's being worked on.

The replacement will be available "in coming months" and the app will be maintained until December (and probably work until 2023), so the two will likely overlap while a simpler Web app is already available today.

Where do you see a problem?

I use MS Teams (Preview) on Linux. It's good enough for chat, doco sharing and other stuff it does. I don't give a crap about galleries, reactions and whatnot.