Who are the worst people, according to the Noble Messenger's Hadith?

The worst of people are those furthest from God's methodology. Prophetic hadiths describe categories of them, such as the two-faced person who approaches people with two different faces, the one whom people abandon to avoid his evil, the wicked man who recites the Quran but does not act upon it, and the one who sacrifices his afterlife for the worldly gain of others.