look i haven't watched wandavision yet, but literally the moment wanda messed with Tony's head in age of ultron she sent the avengers in a downward spiral
Tony's sudden obsession with creating Ultron freaks out the other Avengers. They start to splinter and his anxiety worsens. He ultimately decides his own death is necessary.
Steve's vision of Peggy as "home" begins an obsession with returning to the past. His personal goal of rescuing Bucky is not enough, he wants to go back.
Natasha's haunting flashbacks fill her with self-doubt and the belief that something will always be wrong with her. She decides her life is worth less than everyone else's and kills herself.
Thor sees premonitions of Ragnarok, becomes obsessed with finding the infinity stones, and thereby neglects Asgard and his family. This ultimately leads to his intense depression.
Hulk experiences shame and becomes reluctant to fight unless he can receive adulation for it. Once Hulk becomes insecure and Bruce has to rely on himself, the battle of Wakanda is lost.
The Accords site the destruction in South Africa, Sokovia, and Nigeria as reasons to undermine the Avengers. Wanda is directly responsible for all three of these disasters, she even accepts the blame. Yet, instead of making amends or accepting correction, she pouts (tfatws bucky works harder to address his sins than her, and he wasn't even responsible!)
And then Wanda, like, doesn't try to fix any of these messes. She just goes from loathing the Avengers to living off them after psychologically scarring them. Like, damn girl, did you work for Thanos all along? Her character is just avengers 1 hawkeye for three movies.
