In the category of wild back stories, this pantheon is giving the Greek Olympians a run for their money.
Ancient gods are not known for their decorum, so I can't really blame the 'stereotypical juvenile dick/fart joke' type humour entirely on the author. He does manage to make some dizzying lore into a cohesive multi-chapter tale, and the somewhat sentimental ending worked for me.
It's silly and colourful and really not for younger audiences.