Tess is strangled by a mechanical suit controlled by the antagonist, but Cady saves her. Various people are shown suffocating to death in a room filled with neurotoxin during a flashback.
Two people have their necks broken, though one survives.
[SPOILER] The true main antagonist has his arm broken severely, with the bone shown poking out.
Spoiler— a character is restrained in a hospital and has a chip put in her brain against her will, with talk of it making her easier to get along with. Very potentially triggering
M3gan bangs her head against a wall. Not sure if it really counts because she doesn't have nerves, but still. It's temporarily seen as suicide/self harm.
Amelia during the party sequence. Cady also says Gemma looks like a "Portuguese prostitute" right before said sequence, though it's meant in a condescending way rather than than sexually.
Severed limbs and bloody injuries, including blood dripping from a man's mouth after he is impaled on a pole. After a man's arm is deliberately broken, it is seen bent out of shape—robot gore, including a partly detached jaw, is also seen.