unnecessary douchebaggery

An unwarranted action by someone who has an over-inflated sense of self worth, that has surpassed the level of jerk and asshole and borders on motherfucker

He called out of the blue, made plans, never followed through, then vanished as quickly as he appeared.

She showed interest and really talked the talk, then her actions showed she was full of bullshit.
These acts are great examples of total unnecessary douchebaggery.