It isn’t the look of the character that I have the issue with. Even in the comics the skull face is a helmet or face shield. It is the character itself the writers butchered.
The Taskmaster of the comics has the ability to perfectly mimic any fighting style or physical ability upon seeing it. The effect is immediate so he can adapt in the middle of fights with opponents he’s never seen but it comes with a downside in that he forgets memories. The absorbed fighting knowledge crowds out memory of people and experience. He functions a lot like the main character in Memento.
He’s a contractor employed by the worst of the worst to teach mercenary forces and to lead missions. His booking is facilitated by a handler named ‘The Hub’ working for ‘The Org’ who pays his credit cards, etc., and he can’t betray them because he never remembers anything.
He checks in with ‘The Hub’ almost compulsively through a phone number he doesn’t know how he knows. The Taskmaster wasn’t always like that. Prior to the change that enabled him to mimic and find new employment teaching bad guys how to be bad, he was an agent for SHIELD.
One of the more interesting villains in Marvel never left SHIELD. He just doesn’t know it, and he checks in with his wife as he always did.
The Taskmaster of Black Widow is said to be a mimic but is programmed via cybernetic interface like the Winter Soldier with a brain implant. How that is supposed to work in the middle of a fight is never explained. There is no character, no motivation to understand. It is a robot with some biologically human parts.
The writers of Black Widow took a highly capable, interesting character and replaced him with a less capable, one dimensional character with the same name.
