Well, in a lot of fanfiction, the idea is that Tony's creation of Ultron was a complex situation. He was acting out of fear for the safety of the Earth. The Avengers had faced many threats, and he thought an AI like Ultron could be a preemptive defense. So, the fanfiction authors don't blame him as they understand his motivation and the unforeseen consequences that came with his experiment.
Yes, there are likely fanfictions out there with such a plot. Fanfiction writers often explore different dark and angsty scenarios for their favorite characters. However, I can't specifically point you to one as there are countless fanfictions in the Avengers fandom.
Maybe it's his wealth. His vast wealth can create a sense of inequality within the team. Some Avengers might feel that he uses his money to overshadow them or make decisions based on his financial power rather than the best interests of the group. Also, his high - tech gadgets and suits might make other members feel inferior or left out.
Well, in the 'Avengers Tony is a God' fanfictions, Tony's character evolution is really interesting. His technological prowess is often magnified to a god - like level. For example, he could have the power to create and manipulate matter at will. This not only changes his relationship with his fellow Avengers but also how he views himself. He may struggle with the newfound power and the responsibility that comes with it, just like in the original stories but on a much grander scale.
Differences in ideology can also play a part. Tony might have some views on how to handle threats or use technology that the other Avengers don't agree with. Maybe he's more willing to take risks with untested tech that could endanger the team or civilians, which would lead to resentment.
He could also become more defiant. Instead of trying to win back their favor, he might double - down on his actions and beliefs. For instance, if they hate him for his use of a particular technology, he might continue to develop it just to prove them wrong.
In a Tony Stark Avengers toy fanfiction, imagine the toys are actually miniaturized versions of the real heroes. Tony Stark's toy is the most advanced. It can repair the other toys when they get damaged. A villain tries to steal the Stark toy to reverse - engineer its technology for evil purposes. The other toys, with the leadership of the Stark toy, must fight to protect themselves and the world from this threat.