I think the worst example is when Boston Rob came on and everyone blindly followed him all the way to him wining a million dollars. I couldn't believe they didn't get rid of him at the last vote.
That season drove me nuts how everyone just had this crush on Rob and were sheep being led to slaughter. He deserved to win that season with how dumb everyone was to let him call the shots basically from day 1.
Love or hate him Russell Hantz 1st season was a brilliant game too but in the end he pissed off too many people with all his blindsides and idol plays it was a bitter jury that didn't reward him for the great game he played. Every jury seems to be different as some who have played the best games got rewarded while others got screwed in the end because people took the social part of the game too personal and voted for someone they liked better even if their overall game lacked. Russell basically played the exact same strategy his 2nd season too because he played in back to back seasons so his 1st season hadn't aired yet. Made the final 3 again and ran into the same issue that cost him the win the first time. Was the 2nd person voted out his 3rd time playing which was no surprise because by then everyone knew who he was and his game play.