Because my mum is like this.
She was supposed to stay from Weds to Sun and went home in a huff yesterday. She blew up because I answered a question rudely (apparently) and I obviously hate her and don't want her around.
If the DCs don't want to talk on the phone or FaceTime or they go off and play then they clearly don't like her (they are 5 and 3 and both have some SN, I have just found out).
If a friend doesn't invite her to something or is off in any way then they also clearly hate her.
She was so upset she says she cried when her GP changed over to a phone triage system. I think she thought it meant they didn't trust her? I was a bit confused.
She and my DF are divorced but still see each other and are reasonably friendly. But she's always telling me he's "too busy and important" to do whatever she wants him to. I will admit my DF doesn't have the best social skills in the entire universe but he's quite low maintenance and we enjoy having him to stay. But she is convinced he is horrible to people (both in manner and in not being willing to help people) and tells me I'm just like him.
I know she's been depressed on and off and this can be part of this (believing everything is happening for the worst reasons). She's having none of this though and also "there's no point in talking to the GP, they won't be able to help".
(Oh and in a possibly related issue she has called my DS a "brat" twice. I only just found out about the second time - I let it slide the first time because I don't think DS knew what she'd said).