Late Stage Capitalism

Most Batman villains are attempting to destroy the structures that allow a billionaire like Bruce Wayne to exist. Usually via some perversion of what anarchist ideas are. The villains are portrayed as insane radicals with no care for human life. It's a common theme of all comic books. That the villains are the ones trying to fight the class hierarchy; and thus must be portrayed as insane blood thirty monsters.

Though you're right. He focuses on fighting the villains that attempt to either disrupt the class structures. Or, fights villains that directly steal from the rich (cat women often engaging in grand theft). But, the main people that he is fighting (or killing?) are low level thugs. It's the common theme of the "hero" spending the whole movie performing actions that undoubtedly killing or harming random members of the lower class. It is often only when faced with a corrupt politician or a corrupt villain of the ruling class that the conflict of hurting or killing them appears in the story. The victims of the lower class often have to be "perfect victims" to be seen as worth saving.

There is obviously parts of "good" that is done. But these are only ever done as a means to show the class hierarchy "working". The good must be done within the current structures of capitalism. Like you said, hiring petty criminals. The "good" is done out of the kindness of the ruling class. "We don't need to change class hierarchy. We just need need good rulers" is the theme