If Tony in another universe is loved by everyone, it's because he does NOT behave like MCU!Tony
The prop-Tony writer of the original really hasn't thought this through. They pretend MCU!Tony is a poor, put-upon woobie who gets sent to a universe where AU!Tony is loved. If they're suggesting that the two Tonys are the same, then their "fanon version of the team" have to be as oblivious as Peter and Happy, who never seem to realize they're being exploited or made fun of. (And poor Steve and Bucky must have been brainwashed as well, because they end up in bed with the man who mutilated Bucky).
Because otherwise, AU!Tony has to be COMPLETELY different from MCU!Tony. He wouldn't be homophobic, transphobic, or misogynist. He would respect his colleagues and wouldn't hide his plan to unleash Ultron from them. He wouldn't think being able to keep Pepper and Iron Man was worth stripping enhanced people of their rights. So, pretty much NOT Tony.
***
Tony KNEW he shouldn't have touched the glowing orb with his bare hand. But sometimes you just had to.
He looked around the living room of an unfamiliar apartment. He didn't know where he was or where his suit was.
Suddenly he heard voices from down the hallway and steps growing closer.
He braced himself when Cap and the Winter Soldier walked into the room, dressed in sweatpants and tight T-shirts.
Cap smiled and said, "Tony!"
He came forward, picked Tony up, and whirled him around. Cap said, "I KNEW you would change your mind. You NEVER could hide using the scepter from the team--think of what would have happened if you and Bruce had actually tried to upload Ultron."
Cap put Tony down, wrapped an arm around Tony's shoulder, and walked him toward the couch. Cap continued, "And you would NEVER try to make anyone sign the U.N.'s Accords. They're AWFUL. How can the Avengers operate if we have to wait until some panel gives permission to do ANYTHING. And if we DON'T wait, they throw us in jail with no lawyers or trials for as long as they want. You would NEVER agree to something like that, especially knowing that there would be no way to force any amendments."
Barnes stepped to Tony's other side and said, "And it was great of you to apologize for attacking me. Even better that you stopped when I was no threat to you. Just like you didn't shoot Sam when he tried to help Rhodey at the airfield."
Cap nodded and said, "It was very brave of you to come when we had more people than you were expecting, but you DIDN'T try to blackmail that teenager into helping you out. And you actually LISTENED--about the problems with the Accords and the threat of the Winter Soldiers. No wonder we developed such strong feelings for you."
Tony waved his arm and said, "Freeze simulation. Even I don't believe that's still me."
He stood in the frozen scenario and said, "Friday, let's do a little editing."
Friday replied, "Yes, boss."
He said, "Adjust Rogers and Barnes so that they KNOW everything I've done. BUT they still love and dote on me anyway."
Friday said, "Boss...that doesn't work with the templates. The core principles are based on all of the information provided. In this scenario...it just wouldn't happen."
Tony frowned and said, "So make a copy and adjust the templates. I want them loving ME. Exactly as I am."
Friday said, "Yes, boss...resuming scenario."
As soon as Cap and Barnes came back to life, Tony knew it would never work. The two men were smiling vacantly, in a way that reminded Tony of the last Stepford Wives film.
When the men stepped forward, Tony stepped back.
Cap said, "I love you, Tony."
Tony actually cringed at how fake and mechanical it sounded. Both Cap and Barnes looked like Friday had scrubbed them clean.
He asked, "Friday, what percentage of the original templates remain?"
Friday replied, "I kept as much as possible while fulfilling the requested parameters...Barnes retains 35 percent, Captain Rogers 27 percent of original profile."
The two men--two constructs stepped forward again with their empty eyes and open arms.
Tony fled the room. When he was in the corridor, he said, "Delete templates and program."
He should have known that the only way to get a different reaction from Cap and Barnes was to BE a different person.
The project was doomed from the start.