Toxic people can't change, my friends... or if they do, it takes years or decades of therapy, 12 step groups and commitment on their part. Sometimes it takes extremely painful life experiences and a long string of losses for them to realize they have problems.
A lot die without any sign of the most minimum introspection.
It is not our job to save others or to psychoanalyze them... we are not alive to suffer. We do not deserve mistreatment nor aggression of any kind, period.
I think this was the first time that I actually said "No" to something damaging to me and it is a good feeling. "To thy own self be true"