I appreciate your nuanced reading.

Yes, it's possible that it came from a place of wanting to help.

And, after the offer was spurned, the kindness was immediately replaced with wrath, at "how dare she turn me down?"

So, both can be true: she can be kind and helpful, but also petty and vindictive, and unable to see other people's perspective. Being permanently surrounded by sycophants and yes-men/women will probably distort most people like that.