Yes imo, they are good character designs and bad character designs, Good character setups, and bad character setups. It is the effort to make something work is what a writer actually determines good or bad "character". Some character designs aren't worth the effort to fix them. If you have to change the look, the personality, do retcons fix the story to throw away baggage, etc. You might be better off just using a new character which is the effort of all that fixing instead, I think you can fix any bad characters but also think the end result is often a new character. For me, as I see it the Immortal Hulk is a brand new character the beauty of fiction that any character can be repaired like that but on the other hand I think we are missing out on the potential next big character in putting good ideas into old things.