I absolutely despise Discord for anything more than a couple of friends chatting. It is the worst way to have discussions with a large group of people that I can think of because you have to wade through so many junk messages to read anything of interest.
Discord can be great when people treat it properly. That is, treat it as IRC for the modern age, rather than a replacement for forums.
Just like in IRC, you probably don't care about most messages. You don't need to be in every conversation. But it can be a great way to just jump into a live conversation or start a new one.