Where I'm from, we refer to insecure individuals that obviously lack mental acuity, knowledge, experience, confidence, strength and humility, but adopt various pretensions in a misguided effort to compensate, as wannabes and posers.
These flawed individuals typically garner little sympathy, offering them constructive advice is usually viewed as futile, a few pointed and choice words of negative reinforcement are offered instead and we just walk on.
My intent with this post was to do likewise.
Tim