I noticed something about Tony Stark's ending.

Yes, it is. If the police discovered that a private citizen had stockpiled all the ingredients and information needed to create a deadly chemical weapon, then that person would be put on a terrorist watch list, even if he hadn't actually created the chemical weapon yet, and an alert would be sent to every law enforcement agency.

Tony Stark, a private citizen, had control of 100s of military attack drones that he could unilaterally order to strike against anyone or any city anywhere in the world. Governments might want to have control of military attack drones, but there's no legitimate reason for any private citizen to have unilateral control of 100s of military attack drones, unless they're a terrorist.

So Tony Stark was a terrorist. Like I said before, MCU made a terrorist the main "hero" of their 22-movie saga.