I’ve noticed that Screen Junkies and a lot of people seem to think that Jean is being corrupted by the cosmic force, which isn’t happening at all.
The movie and filmmakers have said Jean is suffering from a psychosis as the result of repressed childhood trauma. Hence the saying “the mind of psychic is fragile it takes the slightest tap to said it in the wrong direction”.
They wanted her to be a relatable protagonist, not a villain.