I had the choice of using discord or teams yesterday to review something and we both picked teams.

This is just like the hate for paid databases, operating systems and big clouds. Easy targets that seem politically convenient to attack on statistical grounds ("I think most people here might agree with me"). It's ultimately childish behavior. Adults explore nuance and find compromise between competing ideas. I find myself constantly defending the proverbial empire around here because of the intense tribalism. If we were focused more on the customer and doing a good job, half of this nonsense would disappear overnight.

Microsoft makes some of the best software on earth. Teams is certainly not an example of that (yet), but it's also not the worst thing they've done. Not even close.