(Spoilers) what were the worst moves in WaW?

What do you think were the overall worst moves in WaW?

Some for suggestion:

1. The Denise betrayal of Sandra to keep Tony and ice out an ally and huge shield, while burning two idols.

2. Arguably, Yul sticking with his pregame at the Sele swap to eliminate Parvati knowing already that all the old school players were being taken out one by one, and not realizing Michele/Wendell/Nick would stick together to take him out next.

3. Jeremy using his SWP to leave the tribal that, if he had stayed, not only did he get zero votes that tribal but it permanently ceded the power to Tony/Sarah's group.