Manga Revenge Isekai Novels & Stories

It's not like I'm a saint myself. After all, there's nothing that can completely distinguish good from evil. For what some call evil, may be good for some. So, I wasn't going to pry too much on other people's affairs, and I was definitely not going to take revenge on behalf of Meredith or Bella. Honestly it baffles me how in most isekai novels that I've read, the heroine always feels the need to take revenge and set everything straight. Because, after experiencing it myself, I realized that I had a different mindset from them.