Vain

1. Overly proud of oneself, especially concerning appearance; having a high opinion of one's own accomplishments with slight reason.
2. Having no real substance, value, or importance; empty; void; worthless; unsatisfying.
3. Effecting no purpose; pointless, futile.
4. Showy; ostentatious.

(overly proud of oneself): conceited; puffed up; inflated

(pointless): pointless, futile, fruitless, ineffectual

arrogant