What I got from their complaints was that it didn’t feel true to the character of T’challa that they as fans, have come to know. And while I don’t agree, that’s fair enough. How may times have we felt the same way as Storm fans only for other X-men fans to “not see what all the fuss is about”. They don’t know/care about her like we do, that’s why. So as far as I say, let fans have their own personal qualms with how writers portray their faves. Everyone’s gonna have their own opinion on it