One of my grans had the whole dementia thing too, I definitely sympathise with anyone going through that.
I have to say there were some funny moments in there, when she was busy chatting to imaginary dogs and telling us about how her and a friend bust out of the care home together to go to town (she couldn't go more than a step unassisted, her friend was wheelchair-bound and had had a stroke, there wasn't much happening there either). But generally, just absolutely horrible in all ways for all concerned. Sympathies to all of you!