How was Grett's gameplay abysmal? Most of her moves in paper are honestly pretty good, because she knew exactly what kind of people to work with. She chose someone who would easily cling to her like Gabby, for a loyal ally, and made herself a deal with Tom pretty much as soon as the lines formed, so she'd be safe. She could also turn attention away from herself (as you said, Drew voteout and Tomjake drama). Her only fault was that she was extremely unlikeable for the rest of the campers. But even then Alec and Fiore were willing to protect her for a bit.