Teams definitely feels bloated, but having used it for years at my lost job, I can't say I ever found it buggy. The only issue I ever had with it was actually with my bluetooth headset sometimes not being recognized, but it was never clear if that was an issue with Teams, or Windows, or the headset itself.

The Outlook integration for planning and joining meetings was super handy. If there was some way to get email in Teams then I never would have had to open Outlook again. That would have been nice.

I think the features need a lot of refinement, though. Having threaded and non-threaded chats is clumsy at best. I found the threaded chats to be far inferior, and the inability to search for non-threaded chats was very limiting. Search in general was borderline useless.