These sanctions are entirely non-violent. The actual word you’re looking for is harmful. They’re designed to be harmful, economically. Responding to regimes like this with economic pressure is most certainly preferable to actual violent conflict. Which would be guaranteed to kill thousands of innocent civilians.
Given recent history, if you think electing to use non-violent methods to sanction these governments is disgusting, then I really don’t think there’s anything I could say to you.
If the regime in Iran falls. It won’t be because of US sanctions. It will be because that country has been operated by a brutal dictator for decades, and the Iranian people grew tired of being the enemy of their own government.