Why was Ahsoka surprised that Anakin became Vader?

Maul literally told her that the Jedi and the Republic were about to be destroyed, and that Anakin was being groomed to be Palpatine's apprentice. She didn't believe him, but then Order 66 happened, proving that Maul was right about at least half of what he had told her. So why didn't she realize that he was actually telling the truth about Anakin? And later on, when she heard about Vader, the mysterious new Sith Lord doing the Emperor's bidding, how on earth could she not put two and two together? Did she really think Anakin had died during Order 66, even though Maul explicitly told her Sidious had special plans for him? Also, how come she never bothered trying to seek out Obi-Wan, who would have definitely told her about Vader and how Obi-Wan "killed" him on Mustafar? If Ahsoka could survive Order 66, surely she must've realized an even more powerful Jedi like Obi-Wan definitely could have too? via /r/StarWars https://ift.tt/Dcnd0zg