There should be little problem in a properly written Doom feeling entitled or superior to Wakanda, since a properly written Doom feels superior and entitled to everyone. As I said, he'd feel that way for Carol or Steve too. That's just Doom (or at least the comic Doom... we'll have to wait and see what MCU Doom is like if he ever shows up).
Obviously we're just speaking hypothetically and I don't know how Doom would be used or what sort of response the community might have. All I can say is given what we've seen, I'm willing to give Coogler the benefit of the doubt until he gives me reason not to. IF he chooses to use the character (and again for the record I'm not expecting at the moment), I believe he'll use the character well for the benefit of BOTH BP and Doom.