Are You Crazy?! Yeah, I Have a Split Personality

After transmigrating into a two-headed dragon, I worked hard for over a volume's worth of time and became a plant wholesaler (Evil God) in the Negative Universe. But I keep running into scumbags.

The scummy church that freeloaded on my ritual knowledge, then cursed me as an Evil God.

The scummy Demon King who summoned me for help because he couldn't beat the Hero, then got scared of me and stabbed me in the back.

The scummy woman who summoned me for the heroine, made everyone turn against her, and wanted to keep her all to herself.

The scummy deity who had me bring my legion to fight in the divine war, then went back on their word at the last minute.

Note: The protagonist is disgusting, literally.

Note: He's already dead.