In the comics, Kang doesn't eliminate Ant-Man. The interactions between them don't lead to that outcome. Their paths don't cross in a way that results in Ant-Man's death at the hands of Kang.
Sure. In some comic arcs, Ant-Man has squared off against Kang. The battles often involve complex plotlines and showcase their unique powers and strategies.
In Ant Man 2, Scott Lang continues his adventures as Ant Man. He has to deal with new threats while also trying to balance his superhero life with his family life. There are new characters introduced, like Ghost, who has her own motives and powers. And of course, there are lots of cool shrinking and growing scenes that are typical of the Ant Man franchise.
Well, Ant Man 3's story involves Scott Lang being drawn into a strange new world. He has to deal with powerful foes who are after some sort of important technology or power. His daughter also plays an important role in this story. There are a lot of exciting moments where he uses his ant - like abilities to fight and survive in different situations. Plus, his relationship with Hope and the other characters adds an emotional depth to the story.
Yes, Ant Man is indeed an Avenger in the comics. He's been part of the team on multiple occasions and has played important roles in various storylines.