Does it drive you nuts when people write, "Could of," like, "I could of gone to the store"?

Makes me want to scream! What’s wrong with it? Well, put it this way. You might write, “I could of gone to the store.” If you take the word “could” out you’d be left with “I of gone to the store”! You wouldn’t say that! You’d say “I have gone to the store.” It’s a contraction of “could” and “have.” It’s COULD’VE!!
it really is. sobbing with my face in my hands.