It’s worse than merely destroying character. It causes a person to disconnect from others. It devalues humanity. But there are worse evils in modern society that do a better job of that.
Sexual immorality is up near the top of the list of character destroyers. And those who habitually practice it usually develop or have other grave flaws as well.
People who use others sexually devoid of marital commitment see others - any others - as objects to use and discard when no longer useful. Hearts become coarse, calloused, hard, then cruel.