Imagine the balls it took to willingly attach the Microsoft label to the front of the product that is Teams.
I feel like a recurring pattern with Microsoft is to create something quickly, market it aggressively and push for everyone to use it immediately, and only once it is installed everywhere do people suddenly realize how terrible it is, but it's too late to change.
Vista on the other hand...
I suspect I might have hated 9x more but I was pretty young when they came out and I didn't really "get into" computers until XP, and I disliked it enough to dual-boot Linux as a twelve year old.