You don't agree with Discord's practices and lack of privacy, something which, by the way, I agree with you, and as such, decide not to use it. They are not discriminating against you, you're the one deciding not to use their service. To me, it sounds the same as if you don't like McDonalds because it's unhealthy, then accuse them of discriminating against you because they won't serve you some lean chicken salad.