Just because MS Teams is an even worse train wreck does not automatically make Slack brilliant. The whataboutism when people criticize a program that they happen to like is wild. The complaints in the GP are exact complaints I have. I'd even add having to type a space before using a slash character when all you want to do is type a path to something.

Yes, MS Teams might actually suck worse, but don't try to diminish valid complaints about something else that also sucks