Okay, I was expecting something a lot worse than what the article describes. I hate ads as much as the next guy, but at least these ads seem somewhat topical and also give tangible rewards for doing something that you might do already anyway (stream a game to a couple of friends in a private Discord server). Maybe I'm misinterpreting the change, but this doesn't seem that bad?
I'm not sure what everyone's hangup is about Discord. My group that I play video games with swapped over to Discord from Skype years ago and it's still a good experience. You want to hear about enshittification? Just look at what they did to Skype over the years. That platform is completely unusable now.
I doubt Discord will remain totally useable forever, but at least there are budding alternatives out there that might be able to carry the torch if Discord can't continue it's freemium service. One that I've tried in the past is Guilded and they are sort of like a Discord clone if you really want the same general user experience - pseudoforum live chat with VOIP lobbies, streaming capabilities, etc. I tried it out and it was fine but not worth swapping everyone on our Discord server to the new one since it wasn't substantially different or better in any way.