More monsterious than allowing Palpatine to exist?

Still-

-Vader can't quite cast away the unbidden memory of Ahsoka, more than a decade younger that Luke glaring, blue eyes angry and hurt.

"I wanted you to surrender. For what you have, it was admirable. You could be so much more in just a few years. But you share Anakin's weakness, you wouldn't abandon your friends. I knew that. I took advantage of that."

That didn't banish her face. But it faded it.

"Food. Or rations, whichever you prefer. I want to see her before we leave this planet."