Him and his father helped a racist white South African steal Wakandan resources and killed Wakandan's in the process. He wasn't fit to be king with a wicked blood thirsty spirit. A hot headed leader will run their nation/people into the ground. It's a universal principle, no way around it.
Yes the movie let the women control everything which is NOTHING like African culture, so the movie was inconspicuously backwards and dark in 1000 ways which did the original comic a disservice. Part of the agenda of course, but people can speak with their money.