There could be a friend of Tony, like Steve. Steve might not understand Tony's dislike and keep trying to hand him things out of kindness, which could create some interesting interactions in the fanfiction.
Maybe Tony is a very independent person. He likes to do things on his own and get things by himself. Being handed things might make him feel like he's being treated as incapable or like a child.
Could be that the characters aren't relatable or the themes don't appeal to your interests. Sometimes it's just a matter of personal preference and not a reflection on the quality of the manga itself.
Well, it could be that the characters or the plot don't click with your preferences. Sometimes the art style or the way the story progresses just doesn't feel right for certain people.