When old people are portrayed in the media as cantankerous and grumpy, their anti-social behavious is usually offset by an admiration for having "attitude". And if it's a movie, that old person probably ends up passing on great wisdom to the younger person who previously resented them.
But what if an old person is cantankerous, grumpy, utterly negative, paranoid, unappreciative, demanding, suspicious, and miserable - and refuses to redeem themselves Hollywood-style? What if that person is your aging parent and you can see that in the near future you're going to have to make that choice?
Old folk's homes with Chinese-speaking staff and/or residents are pretty damned rare in these parts.