Perhaps she'd outlived her time, for her sole remaining joy seemed to lie in criticising others.
Sometimes, she wrote letters to her neighbours detailing their faults: anonymously, naturally, but everyone in the community knew who'd sent them. If chided, she claimed she was "only joking", but no-one was fooled. Once, she'd have been a candidate for the ducking-stool; these days townsfolk just spoke about her behind her back.
She died alone, her body lying undiscovered for several days before anyone noticed.
Pity, really: she wasn't all bad, she just went off-colour towards her life's end.