Have you tried assaulting your boss and restarting your superhero career?
Let’s be honest here: Going by traditional superhero storytelling, the hero assaults his boss NOT because he’s sick and tired of telling people they’re going to suffer and die (or their loved ones), it’ll be because his boss yells at him or turns him down for a promotion. No traditional hero throws away a vicious career for the sake of others, they do it because they were personally affected.
Not saying there aren’t stories that break this mould (why is this registering as a spelling error?), but traditionally this is how the story goes. Basically it’s the idea of ‘no point helping others until I don’t get what I want’.