I hate discord, its a jumbled mess that is basically a texting app, and Slack never grabbed me.Discord is by far my favorite, then Slack. Its a bummer you don't like those, what do you use?
My company uses teams, and like i said I'm no fan, but for work its manageable. At least with Teams, we can easily share files, collaborate on documents, do video conferencing, and work with calendars. Correct me if I'm wrong, but discord is basically a texting app, yes it can store files, and you have voice chats but its no where near as robust as Slack and Teams.
Also for gaming stuff, its horrid, Bethesda sun set its forum and lieu of Discord, and its basically a wild mess of people texting random things, instead of having any sense of organization and debates/dialogs. Maybe for in game stuff, Discord is fine, as you're playing and want to chat with a friend as you doing things, but for discussions outside of that, not so much