I watched it on demand when falling asleep, but caught the final on regular TV last night. I thought it went a little over the top when stressing dangers and what the isolation did to their minds (serious issues...just thought they over dramatized those parts a smidge more than I cared for), but I enjoyed the show.
If I recall correctly, Lucas essentially just wore out and missed home. There wasn't a specific reason.
I was rooting for the kid (horrible with names....he was the 2nd to last), but would could tell for a while that the mental aspect was going to wear him down...It'd be hard being that young and having a pregnant wife at home. I could see how that would eat at a person.
I asked the wife if I did that, how
#@$%ed she'd be at me to be gone 50 some days, and not win. If I ever did that, I'd have 3 choices: quit within the first few days, but after a couple weeks being gone, it'd be win or die in the woods, as she'd kill me when I got home for being gone that long, if I didn't have a check for 500K in my pocket.