EDIT: Thank you all for detailing your experience with, and hatred for, this miserable product. Your display of solidarity is inspiring. Now, say it with me:
We user / have used Slack, Zoom, Meet/Gchat and a VERY brief trial of teams.
We have O365 AND Google Workspaces so we get teams and meet for free.
Zoom is the best to host a large meeting with a split presence. It's the best at dealing with variably poor connections. It shines on being able to share any specific app and sound control.
Meet is the best for small, low-friction meetings. However, it is hampered by its inability to share anything but browser tabs with sound, poor camera control, and poor user display.
Slack is a fantastic, too-flexible chat system with organizational issues. When it works, it works pretty well. However, it has intermittent video and mic problems on many systems. It is not good on poor connections and occasionally not good on fast connections.
Teams is bloated, many systems run it poorly, and there is an unacceptable amount of server-imposed downtime/issues.
Sounds like you're getting better numbers than we do :) Wonder if there's some incompatibility in our fleet hardware that you don't have. We're mostly Dell XPS. The biggest problem we regularly have is the audio output and mic inputs going rogue. They'll be using the machine with sound all day, no problem, go into a meeting and there's no sound. They'll have the same problem with microphones. Somehow the browser session behind the scenes doesn't pick up the current default device settings and the volume for the Slack session ends up being muted.
Ah could be hardware/OS, yeah. I believe everyone at our company are on MacBooks (I'm a Linux guy myself, but orgs don't usually like that).
My personal laptop is a Dell XPS 13 and while I like it for various reasons, it has had plenty of problems with the built-in mic and video (mostly the mic). So it very well could be that.