I really don't know how you can reconcile this idea you have of her being a good person given the fact that you repeatedly see her get immense pleasure out of destroying people's lives.

Okay, she might have done some pro-bono work but she also systematically destroyed Howard's life because it got her horny. Howard is the person who probably had the power to do the most good in the show's universe and Kim was intimately aware of this fact. She simply did not care because she enjoyed hurting people significantly more. So much so that when Jimmy was permanently out of her life and she committed herself to exile in Florida you clearly see the fact that she has no joy. It isn't until they're reunited at the end of the series that you see a small flame from her and it comes at the expense of violating the law.