The thing is Discord isn't finished with upsetting people - it still has to do a lot more stuff to get more net income for their IPO. How they will do that without seriously annoying users is hard to say. The more they annoy their users the more the users flee, boosting the value of the competition.
Discord does have some user capture, but nothing like twitter's - where followers & networks are valuable and can take a long time to aquire - and twitter's competition was able to scoop up a huge number of outraged users despite even that. Granted - I think Twitter's changes annoyed people much more than Discord's.