What’s really interesting about Jasper’s appearance in this episode is her escalation of behaviour. When we first saw her, during her fight with the Crystal Gems, she was rough and intimidating, but not unreasonably violent.
She didn’t kill, she captured.
Now in this episode, Jasper is ready to shatter Steven because Lapis won’t fuse with her. And I think this, more than anything, shows that she really really needs help.
Jaspers are supposed to be ‘huge, loyal soldiers’ but being Malachite has screwed her over so bad that any loyalty she had for Homeworld got eradicated. She doesn’t care about Yellow Diamon or her mission, she doesn’t care about anything except getting back the one thing she thinks she needs to be strong.
Malachite has messed her up and manipulated her beliefs so badly that she doesn’t even realize how much it fucked her over.