If Civil War T'Challa is apparently closer to his comic book counterpart, how come that movie never even implies that he's a super genius and inventor on the level of Tony Stark? Isn't that what the entire complaint is because you feel Shuri was given that?
Do you guys just want bragging rights or can we just accept that T'Challa being an inventor which MCU Shuri is, really isn't his defining trait? Even Civil War shows that T'Challa had a team investigating his father's death, not himself. That's a constant in how T'Challa has been written since Priest.
T'Challa's genius has always been at its most interesting when he's outsmarting people in intellectual and political games of chess, and in combat, not bragging about his inventions. In all her genius Shuri never solves any of the film's major problems so I don't even know why this is such an issue.
It's like complaining about Batman not being shown to be an inventor when his genius has always been at its best when it's applied to detective work (and other members of the Bat-Family have been established to be smarter than him).