My biggest problem with Discord is still more related to support communities (what would have previously been a focused forum or subreddit) moving there, and the subsequent lack of archival of topics and answers for future reference.
Quite infuriating especially on a lengthy thread. There's a 5 year old feature request that nobody ever bothered to respond to.
https://support.discord.com/hc/en-us/community/posts/3600320...
They added the concept of a "forum" channel, where you can have individual support questions, and each one has its own thread that addresses that specific question.
Better yet; the search box and the "make a new post" box are the same box. So if you're starting to ask your question, as you type, it's filtering previous questions based on the words in the question you're trying to ask.