Everytime I read something like this it's almost always because the author does not actually know how to use Discord.
There's some nice search features: https://support.discord.com/hc/en-us/articles/115000468588-U...
And on top of this I'd push the Discord to use forum channels if they do not already https://support.discord.com/hc/en-us/articles/6208479917079-...