[fmpwizard]

Like many others, we were also forced to use it at work, hard to pick the worse part of Teams but a big one is how slow it is from the time I click the "reply" link until I can actually type a message. So many times I click, start typing and then I notice it missed about 4 to 5 letters, and I don't even consider myself fast at typing. Oh, and how you upload a file/image, need to wait until it is fully uploaded but after that you still need to click the "Send" button to actually post the file. It's definitely an enterprise kind of app, one that makes sure you take forever to do anything.

[userbinator]

There's also a very noticeable lag on mute/unmute, that causes others in a conversation to miss the first word or two that I say immediately after unmuting. The workaround is to wait a second or two before speaking, but I've used VoIP and video back in the MSN Messenger days, on a far less powerful machine, and it didn't have that problem.

[johnwalkr]

I always forget this. And then if you send the same file to someone else it overwrites the file but the first file and the first person can no longer access it? And then you realize it’s not just a file but a share point link? Yeah that will surely work next year when you need to Go back and double check something.

[jachee]

How about when you [alt/cmd]-tab to it, it shows you a blinking cursor in an input field, but no matter what key you hit, you can't type in that field without clicking on it?

Infuriating.