It's legit bad for certain uses like any platform, sometimes people try to use it for those things. Linuxbros don't like the idea of Discord in general regardless, for them the platform takes president over whatever people do on it, and assume that since the platform is bad anyone who uses it is stupid.

I don't really care about the platform if it has good communities on it, and I've found a lot on Discord which I haven't found anywhere else. I'm on an electronic music production server where people share works in progress, help each other, big names in the scene use it out of genuine interest as well. I've shared my own stuff and connected with people in the scene across the world to share our project files and instrument presets etc. Don't really care about Discord though and would gladly use any platform with a community like this on it. Saying "Discord sucks" and referencing legit reasons why isn't going to convince me it hasn't been useful for passions I have offline.

Also I've hosted a weekly dnd sesh on Discord for three years now after we went through basically every other platform through trial and error. We had no loyalty to anything and Discord has just been the one that works. Super great for organizing a campaign we run through a virtual table top platform.

A lot of the FOSS alternatives are way better at a technical level, I use Matrix for our friend group's privately hosted chat server every day. Haven't found anything comparable to the communities I've found on Discord though.