Some people lack self awareness and don’t realize how their choices and behaviors can affect others. These people can even claim they are victims yet they keep choosing a lifestyle that exposes them to unhealthy people. Try to tell them and they can blow up and get very defensive. Sometimes they can even act very entitled and have strong narcissistic traits. That is not diagnosing someone with NPD or some other disorder. Saying a person can be selfish and narcissistic is not a diagnosis.
The key is knowing when another person is unhealthy and paying attention to your own behaviors that may be contributing and walking away because we cannot change other people only ourselves.