Did a triathlon. Broke my wheel

International distance (40km/25mi bike leg) with a massive hill. 46/17 gear

Somehow broke my axel on a climb. I didn't even know that could happen. Maybe it was broke before and it was just a coincidence that it came apart then? Idk. Is it worth fixing?

I was able to put it back together and cranked the absolute shit out of it then limped to the finish. Sucked, but still had fun!