You can't control what fonts end-users will see.
I've told my browser to always use MS Comic Sans whenever I use Discord. I did it as a joke, for a couple screenshots, but now I'm used to it.
There's ways to 𝒇𝒂𝒌𝒆 𝒅𝒊𝒇𝒇𝒆𝒓𝒆𝒏𝒕 𝒇𝒐𝒏𝒕𝒔 like what I use on the wetfish wiki.