I'm just going to throw my hat into the ring Flo-wise here.
I don't hate Flo.
Yes, she behaved like a spoiled brat for most of the race, but that was just her reaction to stress.
Look at leg one. Flo, with her fear of heights, completed a skydiving task, looking confident about it.
Fast forward to Vietnam. Flo is in the process of having a complete breakdown, Zack can see it.
Teri and Ian can see it.
Flo's going to have a major... incident.
Ken and Gerard can see it. (No quote this time sorry.)
Hell, even Flo can see it.
If I get on this train, I'm going to have a breakdown. Do you wanna see it happen?
All of Flo's whining aside, she was in a genuinely bad place mentally, and it becomes even more obvious when she comes off the train looking like a reanimated corpse.
Yes, she was a terrible whinger, but sleep deprivation, jet lag and stress does things to people.
With Flo, it was just a tad more obvious.
And to finish, I'm going out with the immortal words of Kent Brockman.
And that's my two cents.
PS. Thank you Adam-Troy Castro for saying it first.