Growing up my favorite hero boy was Batman, but its getting really hard to appreciate a character whos main premise is "I'm a billionaire that beats up poor people in a capitalist hellscape because I don't have a healthy way to deal with my personal trauma".
Is there any saving him or is there a version of batman that can exist inside of a left narrative? Maybe there's an existing comic that has tackled this problem, but I'm not really deep into the...ahem...literature.
He can be written up as a Class Traitor. There are a few instances in the Animated Series where that angle is emphasized. Even a couple of the movies flirt with the inherently corrupt nature of Wayne Enterprises.
But yeah, the more common trope is simply that Bruce Wayne has Unlimited Money as a superpower. We're not forced to ask where it comes from.