The most likely explanation is that she spent the last four years reading her own press clippings. She wasn't as hungry because she had already "made it" and she didn't prepare as hard because she thought that she could just waltz up there and kick everyone's butt. Supporting this theory is her diva like behavior, sewing GOATs onto her leo, and being the only athlete that was exempt from having to stay at Olympic Village. Then she gets up there and says "oh f*** I'm not ready for this" and instead of carrying on and giving it her best and not being as good as the others, she said "well I have my medals, good luck ladies" and walked off like a spoilt brat.