This misunderstands the motivations of real-life evil people.

Once you accept there is no afterlife, that your legacy means nothing, and that you’re a piece of shit who has no desire to contribute to society or help others - only your personal success and self-pleasure while living matter.

Tarquin says it best, though much more humorously, here: https://www.giantitp.com/comics/oots0763.html

By Rush’s personal measure, he absolutely won. So did Kissinger. So did Reagan. Trump and Jones and Rogan are on track.

You don’t beat such people with legacy.