The Avengers have been a home for some of the most influential heroes in comics, and together, they've faced countless powerful enemies like Kang the Conqueror and Ultron. But with so many heroes and villains that have interacted with the team, there's been many that have endured personal troubles, from Tony Stark's bought with alcoholism to Bruce Banner's struggles with a dissociative identity disorder. Yet, even with so many unique characters on the team, none have endured more than one of their founding members, Hank Pym.
Source:https://www.cbr.com/the-avengers-hank-pym-redeemed-cartoon/