Without the ability to swagger or have swagger.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life

Lacking swagger obviously.. clumsy, careless, stuttering, lacking style and grace. a person who makes themselves look pretty foolish just about all the time. would be considered "swaggerless"

1. a person who lacks personality and style of their own.
2. someone who can't do anything on their own (constantly jocking someone else's style)