Sounds like a tough day! We've certainly all been there. Do you know what happened in the lead up to the race that contributed?
Were you not in the right mindset at the start? Hopefully, after a little rest and introspection, you'll get your mojo back for the next competition.
Not sure what happened, just picked up the map and didn't orient it properly... I also wasn't really paying attention to the scale because that's what kept messing me up.