I guess this could just as easily be posted in an anti-work community
I feel you haven’t used Teams in years because none of what you mentioned has been my experience starting using teams 2 years ago. (Only point is that I’m unsure about whiteboards, since I’ve never needed to use that)
I don’t think it’s fair to discredit everything I said with “you haven’t used teams in 1.5 years”.
Some of it is opinion " teams is bloated", some of it is a fact “teams is an electron webapp, which makes it slow and inefficient compared to a native app”, some of it is very specific to my setup “teams is broken on my computer with my config of Firefox and Linux”.
I’ve used teams on fast Windows computers with fast internet connections, and it was far less frustrating. Maybe that’s why your experience was better.