ineptitude,
worthlessness having no qualities that would render it valuable or useful; "the drill sergeant's intent was to convince all the recruits of their worthlessness"
vanity -
the trait of being unduly vain and conceited; false pride
vanity -
Any idea, theory or statement that is without foundation.
Wikipedia
In conventional parlance, vanity is the excessive belief in one's own abilities or attractiveness to others. Prior to the 14th century it did not have such narcissistic undertones, and merely meant futility. The related term vainglory is now often seen as an archaic synonym for vanity, but originally meant boasting in vain, i.e.
OmegaWiki Dictionary
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vanity Feeling of excessive pride.
vanity The quality of being valueless or futile.
vanity Low table with mirror or mirrors where one sits while dressing or applying makeup.