You’re not a bad person, not by a long shot. You’re at the beginning of a divorce and walking away from an abusive relationship; you’re bound to have a lot of mixed-to-negative emotions about it. And, unfortunately, you work a thankless job, which compounds things.
All I can really say is, ignore the voice in your head that tries to make you believe you’re a bad person. Bad people don’t worry about if they are, because they don’t care.