The alternatives are just as easy to use as Discord. The audio part is still the same. What Discord makes better is the persistant chat with various "servers", which the others don't have.

You are expected (maybe it's a "gamer" thing) to setup properly. No echo, no loopback, no shitty microphone. Which in turn makes using audio communication a joy to use. MS Teams on the other hand is a pure shitshow because of all the people who can't setup their stuff.