Originally Posted by Teddiursa of the Sky
I don't respect my elders simply because they are old. If they want my respect, they better earn it.
Unless you consider yourself a deviant, raising you relatively properly is deserving of respect in itself. While respect is something to be earned, you should keep in mind that there are many ways for one to earn said respect as well. For example, people give respect to people who dedicate themselves to a positive cause. Most certainly, from my own POV, your parents at least deserve some respect.
I honestly can't imagine, if you are actually calling your parents senile and actually meaning it, the amount of pain that they would feel coming from their son. It is something to reflect upon, perhaps, that you should be wary of your actions from this POV. I don't actually know to what extent you do these things. Moments of fit in an argument? Fine. Everyday life? Not cool.