Now you're just being silly.
HOW is that "being silly"?! Several members of the Avengers were deeply intwined in the events that allowed the invasion to happen. Without Hawkeye's help who knows if it would have happened at all. Yes they also fought it off, but there are a lot of questions that it would be perfectly reasonable to want answers to.
You know what would help provide those answers? OVERSIGHT.
Tony AND Banner made Ultron, from a device that the Avengers attained without any permission in Sokovia (while KILLING people), they did it in Avengers HQ using Avengers equipment, and Ultra's minions were based on Avengers tech. The Avengers are absolutely responsible for Ultron. Tony ADMITS this.I'm sorry, I thought I did. To rephrase: Ultron was responsible for the casualties in Sokovia, not the Avengers; and if anyone should be held accountable for Ultron it's Tony, not the Avengers as an organization.
And Wanda was WORKING for Ultron. She HELPED him.
You know what might have stopped all of this from happening? Some OVERSIGHT.