Kang's demise in comics is a complex matter. It could be a result of a team-up of heroes, or it might be due to an unexpected turn of events involving multiple characters and their actions.
It's a complex storyline. Different comic story arcs have different scenarios regarding Kang's death, and it's not attributed to a single character consistently.
One of the best Kang stories in Avengers might be the ones where he tries to conquer different timelines. His complex schemes and the way the Avengers have to outwit him are really engaging.
It's a complex situation. Different storylines and villains have targeted the Avengers, but no one specific character can be said to have killed them all outright.
The Avengers usually outsmart Kang by exploiting his weaknesses and working together as a team. They might use their combined powers and strategic planning to gain the upper hand.
Sure. There's the story where Kang first emerges as a major threat to the Avengers. His sudden appearance and his powerful technology from the future catch the Avengers off - guard.
Well, it's not super common but it does exist. There are different reasons for this kind of plot. Maybe the writer wants to explore the consequences of a breakdown in their relationship. They had their differences in the movies, like in 'Civil War', and some fanfic writers take it to an extreme by having Tony kill Steve to show how far things can go wrong when they can't resolve their issues.
One reason could be to explore the extreme consequences of their ideological differences. In the official story, they had disputes over things like the Sokovia Accords. In fanfiction, this could be pushed to the limit, leading to Tony taking Steve's life.
My answer was not accurate enough. According to my knowledge of online literature, there is no description or mention of a 70-year-old woman named "Kang Kang". You might have remembered the name or the plot wrongly. If you can provide more information, I will try my best to answer your questions.