My grandpa has alzheimer's and its very bad. I wish he would die. Is it okay to feel that way?

My nanny and papa took care of me growing up after school while my parents worked. My papa taught me to play baseball and throw a mean curveball. In the last 2–3 years he has had alzheimers that has progressed really fast. He still lives at home. My grandma can barely handle him. He doesn’t usually recognize grandma, my mom, uncle, me. He has started falling a lot and recently shit himself. He got out of the house at 2 in the morning and went off for a walk got picked up didnt know who are where he was. He gets aggressive sometimes lately. My mom finally talked my grandma into home health services to come to the house. I know my Papa wouldn’t want to live like this or burden and emotionally drain his family like he does. I know its not his fault. I can’t help thinking I wish he would die. I don’t want these bad memories of him. Am I wrong for feeling this way? I love him so much.