Dr. Hank Pym/Giant-Man (Ultimate Marvel)

Dr. Henry "Hank" Jonathan Pym, also known as Giant-Man, Ant-Man, and Yellowjacket, is a fictional character appearing in publications made by Marvel Comics. Created by Stan Lee and Jack Kirby, he first appeared in Tales to Astonish #44 (January 1962).

While he is one of Marvel's most recognizable and iconic characters, unfortunately, he was badly flanderized in the Ultimate Comics run.

'''This article will only focus on his Ultimate Comics counterpart. If you have any better pointers, please write them down below.'''

"Irredeemable" Qualities

 * 1) As you already know, Ant-Man was flanderized from a scientist struggling with mental issues and mistakes (i.e Ultron and hitting his wife Janet van Dyne/Wasp), and a caring husband into a cruel, abusive alcoholic who assaults his wife (who is a mutant in the Ultimate Comics) frequently, sometimes to near-death.
 * 2) He is also a hypocritical fraud, as he stole his wife's ideas, but blames her for making him "look small", as to say that she took all the credit for the ideas, even though they were actually her ideas to begin with.
 * 3) As mentioned in WHRITIAM #1, he is an abusive husband who has badly assaulted Janet since they were in college, as he brutally punched Janet to the point where the roof of her mouth was split in two, smashed her head through a door, and in the infamous moment where he uses ants to attack Janet while she was shrunken down.
 * 4) He is hell-bent on killing Captain America in The Ultimates #7 after he accuses the latter to coming on to Janet. Thankfully, he fails and gets the shit beaten out of him by Cap.
 * 5) In Ultimatum, after witnessing Janet getting eaten by the mutant Blob, he bites the latter's head off in retaliation. We are not joking.
 * 6) He only got his powers to change size by experimenting on Janet and extracting her blood, and creating a serum to give himself the ability to shrink and grow, instead of creating a serum made from subatomic particles (The Pym Particles as he calls them) that he discovered himself.

Redeemable Qualities

 * 1) He has expressed remorse for Janet, such as when he questions what he did to Janet in The Ultimates #6, and avenging her death by killing Blob in Ultimatum, even though it was pretty out-of-character for him to bite the latter's head off.