How many movies have they had Mystique in?
And then I remember the version of Mystique that I grew up reading. How complicated a villain she was, how bitter and ruthless and resourceful at first, where you thought there was no good in her... and then discovering all those parts of her past that shaped her ideology. Her love for Destiny. Her self-loathing over abandoning Nightcrawler. Her maternal love for Rogue. Her repeated attempts to manipulate and sometimes reform, never being sure which was which. Her misery over murdering her own anti-mutant son. How so many of her actions were attempts to alter a future of misery and despair, to the point where she played the villain and pushed everyone away and isolated herself to minimize the pain.
Selfish, loving, cruel, scared, devoted, manipulative, confused, controlling, broken, strong... when I think about just how complicated and complex she could and should be, to be a character defined by SO much more than just her blue-skin, and to see the movies regress her traits down so much and strip away so much complexity from her... it's been beyond frustrating. She's one of Marvel's most intriguing villains ever, and despite having such a prominent role in all the films, they've merely scratched the surface.