Man, just thinking of the mental anguish that Obi-Wan went through in his adult life. He suffered just as much as Anakin, if not more - yet he never fell from his path. After seeing his love interest murdered by the former Sith - who killed his mentor in front of him - he thought he killed, he went a literal decade in exile thinking he killed his best friend, who was complicit in the deaths of thousands of their fellow Jedi and friends, over something that could have been avoided if they didn’t inadvertently play into Palpatine’s umbrella of schemes nearly every time.
Then he found out Anakin was still alive, and actually responsible for all of the behind-the-scenes action of the Empire.
Edit: to give credit to Anakin, he was a teenager when he began being fully groomed by Palpatine. Given that Palpatine was one of the strongest force users in all of known galactic history, I think Anakin would have been an extreme Grey Jedi at worst if he wasn’t manipulated by the Dark Lord of the Sith
WadeTheWizard