Summary:

Anakin was tired, he was sick of the Jedi, sick of the Sith, sick of the War. He was sick of everything. The immortal time-traveller was done, how long had he spent trying to save the galaxy only for it to ruin his immortal life? No, he'd had enough. It was time for a break. The Whills wanted Palpatine dead they could do it themselves for all he cared. This reset was his break.

Unfortunately, not everyone seems to agree.