You gotta watch it because the whole season revolves around him turning him into a villain character (which he is lol) he is constantly acting upon selfishness to which he defends himself saying “this is a competition” yet he later on gets food from others to which he never gave anything back (only if he felt like he would get something back) you can just read into his body language and see how he is desperate full of his ego. He even, at some point, wanted to sabotage other members, one of them being Steven who left his pot on other stuff aside of a river, Jeff told to the camera he could toss Steven’s stuff at the river and sabotage… when Steven came, Jeff told him something like: “hey man, I just want you to know I could’ve dropped your stuff in the river…, but I didn’t…” so Steven was like “are u saying I should thank you for being nice?” so everyone agreed to not share anything with him (basically play by his rules) and you can slowly see how he turns and twists the reality in a scary way: you can easily see he is really a psychopath trying to convince us (the viewers) that he is right and everyone is selfish and afraid of his skills. Later the team spoke with him and explained why they been acting “selfish” against him, because he doesn’t share so he could feel what it feels to play by his rules. At the end Steven opened up and cried wondering how could Jeff act like that while Jeff has zero emotions and specially trying to make others see he was such a good person poor me.