Yeah the entire piece of software is just really poorly optimized, they use ambiguous language and labels, their controls are constantly in the way (when sharing), and so forth. It is objectionably a bad experience because so many fundamental things about it could be improved drastically.

Instead they needed a modern messaging application and Skype was poisoned by their handling of it so they took a bunch of individual things they had lying around and jammed them all together into a product they called Teams. If you actually look at how it works that is what they did. It's why MS Streams is used for video, Sharepoint is used for network stores, AD is used auth, and so forth. It isn't a single product but rather a shell of discrete things that were made to work together but clearly not originally designed in that way given the performance.