100% know how that feels! Even as a young mom, I just wanted the kids out from under foot for a bit so I could focus on my chores. In those days, their dad and I traded off so someone could work on the chores and the other one could wrangle the kids. (Especially when we had foster kids and our brood were ages 7, 4, 3, and 2!)
I honestly think it was easier to distract my kids than it is my person with dementia. In our current situation, I'm coming to understanding that if anyone is going to change, it has to be me rather than her because she just doesn't have the capacity to change. Is there anyone else in the household that could help out with distracting mom so it doesn't always have to be you? Or maybe you could get a friend or neighbor to come help out from time to time so you can get a reprieve?
Just some ideas – best wishes to you. I know this is not easy.