The Illuminati, a secret organization, was formed to save the world, but its members have done some terrible things on their own.
Initially, the group consisted of Iron Man, Namor, Reed Richards, Doctor Strange, Charles Xavier, and Black Bolt, with Black Panther refusing to join due to the egos of the members.
Their actions led to significant consequences, including the Secret Invasion and World War Hulk, and almost destroying Earth-1610.
Here are the worst things each member of the Illuminati has ever done.
T’Challa was right, as the Illuminati caused the Secret Invasion and World War Hulk, and they almost destroyed Earth-1610.
Author's summary: Illuminati members' wrongdoings outweigh their good deeds.