Anakin was shaking his head long before Obi-Wan had finished.
“I can’t keep blaming everyone else for my actions. No one is holding me back or being unfair with my privileges, no one is doing that to him either. And he needs to realize that, too. Palpatine may have manipulated the truth, lied to me, and used the Dark Side to twists my thoughts so I didn’t know who to trust or believe anymore. But my reasons for joining him didn’t include thinking he was a good man, or the Sith were good. I thought falling would be a necessary evil to save the Republic and Padmé. I thought once I’d completed those things I could simply turn on Palpatine and end that problem and still be a good person. And that’s not something he led me to believe. It’s something that started years before- I’ve been thinking for years I was strong enough to control the Dark Side and come out the other side still good. Because-” Anakin paused, he couldn’t look at Obi-Wan has he finished, “Because I’ve been doing it for years. In smaller ways than what I will do. But all the same...”
Anakin shook his head, again, but not out of defiance this time. It was a concession. “I don’t know. Maybe Palpatine had a hand in creating that idea, too. Looking back… He was always there to encourage me by subtly discouraging your instruction.” This was something Anakin had suspected for a long time, clearly Palpatine’s manipulations didn’t start on the Invisible Hand, but it made Anakin wonder where he ended and Palpatine began.
“But it doesn’t matter if it was him or not, I can’t keep thinking I’m stronger than the Dark Side. And Ani can’t think that either.”