Last Breath Lyrics

Lyric discussion by theflinger 

Cover art for Last Breath lyrics by Mad Caddies

The only part of this song that doesn't fit to me, is "I'm fed up with this miserable life after death" I took it to mean I don't like what's coming in the afterlife, but I'm not sure how this fits into the song. It would make sense if he dreaded it, because he seems to have done some sort of crime while drunk. Why is he "fed up". though?