I hear you. I'm 43, an only child with a high-needs disabled child, and both my parents have dementia. My mum is declining at a far quicker rate than my dad, who lost his short-term memory over a decade ago but is still able to hold a lucid conversation.
I first noticed about 5 years ago that my mum started saying hurtful and inappropriate things, which was out of character for her. She then started forgetting words or obliviously using the wrong words. Just before Covid hit I started recording a family oral history for posterity. Due to lockdown, we had to pause this for 6 months, and by the time we resumed it I was gobsmacked rapidly she had gone downhill. She had no recollection of memories she'd spoken about vividly to me as I was growing up and she couldn't even answer basic questions such as where she was born. By the time I finished I had over 30 hours of family history audio but it all ended up being my dad talking on behalf of them both - I so wish I'd started the project sooner.
An avid reader, Mum reached the point where she was unable to enjoy books, watch the television or take part in conversations because she couldn't understand what was being said, let alone contribute. She stopped seeing friends, or even answering the door because she was too embarrassed by what was happening to her.
She's always been stubborn but dementia has exacerbated this greatly. Dad got her to see the GP who referred her for an official assessment, which included an MRI scan of her brain. She was insistent that she wouldn't go because she was convinced the MRI was going to kill her. Somehow, my dad persuaded her to go, and afterward, having obviously not died, she became convinced that the MRI had 'cured' her and therefore she didn't need any more help because it was a waste of everyone's time.
My dad was in denial because she was still able to cook and clean (he is completely undomesticated and reliant on her in this way) and do all the physical things she loved such as gardening. Mum and Dad would visit regularly to help me with my garden but it reached the point where Mum couldn't see all the real work that needed to be done and simply spent hours cutting the hedge with a pair of scissors, despite the fact we had a hedge strimmer.
For their 50th wedding anniversary, Dad spent a lot of time and expense planning a trip to a 5-star hotel with visits to country gardens which he hoped she'd love. On the morning they were due to set off she point-blank refused to go because she didn't want to leave the house. Mum and Dad's closest friends who they've known for decades planned to come over from Sweden and stay with them but at the last minute after they'd booked their flights Mum turned round and said she didn't want them staying, which was mortifying for my dad to have to explain.
My daughter was critically ill earlier this year and spent a month in hospital, but by this point, Mum couldn't even remember her name, let alone grasp what had happened.
Mum stopped coming with Dad to visit me, so I now only see her if I go to her house and half the time I visit she hides away upstairs, refusing to come down because she has 'important' things she needs to do, such as ironing my dad's shirts and washing her hair. It breaks my heart that my 4-year-old can name everyone in my wedding photos except my mum because they don't have a relationship.
It became apparent during a recent visit that Mum has stopped cooking and Dad has been living off cake and cereal because he doesn't even know how to work the microwave. Mum used to be so houseproud now she just doesn't notice things and there's dust and mess everywhere. She's started hoarding - on my last visit I found over 30 packs of mouldy cheese in the fridge, enough olive oil, and washing liquid to survive the apocalypse, and an entire room filled floor to ceiling with toilet roll.
Dad is insistent that for as long as he is alive they will live together in the home they have shared all their married lives and he will take care of her. I don't know how realistic this is but every time I try to speak to him about what the latter stages of her decline might involve he buries his head in the sand and says he doesn't want to talk about it. At present, he is in good health but he is 4 years older than her and I worry about how the strain of their situation is taking its toll on him. I try and help as much as I can but as I said, I'm a carer to a disabled child and I cannot clone myself. I'm facing a very real possibility that if my dad passes first or becomes unable to cope I will have to move my family into my parent's house so I can care for both my daughter and my mum under one roof. This means I will have to give up my part-time job and my husband will be the sole breadwinner.
Of course, we could look at nursing home options but Mum was always very vocal about how they'd have to take her kicking and screaming from her home - she lives for pottering about in her garden and if that was taken away from her, there would be nothing left to live for. Her own mum got dementia at the same age and existed for 11 miserable years in care, staring into space. At the time, my mum begged that if she ever got like that I should put a pillow over her head because a living hell was worse than death.
Mum is only 73 and is extremely physically fit, so it terrifies me how many years she has left of this cruel decline. She was a highly intelligent, capable and articulate woman and now she is a husk of her former self.
I feel the same as you - it would be so much easier if she just died one day. To anyone who thinks that sounds cold, they clearly haven't watched a loved one deteriorate before their eyes. I've long since come to terms with losing my mum. I've grieved for the person she once was who will never return, no matter how long she survives. In rare moments of clarity, she asks: Why aren't I dead yet? I wish for her sake and all our sakes that she passes soon and can finally be at peace.