Anything that injects DLLs and hooks into lib functions will have this effect on unstable software that was not written with a comprehensive understanding of how the majority of Windows programs operate. It's not Discord's fault that they are using the APIs provided to them by Microsoft fairly, legally, cleanly and non-intrusively and not everyone supports them.

Maybe it's the assumption that legitimate/good-will programs do not interact that causes this issue. It's ridiculous, and untrue. I don't really use Discord and I have a strong distaste for the kinds of social circles that it breeds, but it is a technically excellent product.

If someone wants to see an example of a triple-A game product that is built with this kind-of misunderstanding of the NT kernel and Windows operating system (and shell, and their own compiler toolchain... Oh my...), here lies a funny video: https://www.youtube.com/watch?v=b8xtw54-lCI