"Why don't you?" Grrrr.

It seems that whenever I'm doing something there will be at least one person saying "Why don't you"... (do it some other way).

It's because this is the way I choose to do it, you ********* nitwit!

I don't understand these know-alls. Maybe I unwittingly radiate some kind of aura of - what? - helplessness? Or are they just people trying to reduce their own feelings of insecurity by always professing superior competence.

Watever ... my internal response, occasionally voiced, is "Why don't you" ... (two short words).