I have no problems with discord as chat/supplement (and I remember setting up irc-discord bots in the past so you could totally have both) it's when discord is the only way to interact that it's annoying IMO. Part of the benefit of forums and git issues is searchability imo, can't really search discord externally for content and I definitely have found the search function annoying at best.

That said, video guides instead of manuals also annoys me, but that's a different issue.