I'm not going to visit my dying grandmother
Why would you not visit your grandmother?
She's becoming more and more confused each day
Even if your grandmother isn't acting like her normal self, it would be good for both you and her for you to visit. She will be glad to see you, even if she is confused. And if you don't visit, you might regret it later when you don't have the chance to visit her anymore.
It's just really hard to deal with someone dying of confusion.
I understand that it's difficult, but I'm sure she still appreciates you being there visiting her even if it's hard for her to show it.