Humbling weighing in with my thoughts.
We live in a very difficult tekufah. There are nisyonos everywhere.
So many people are brow-beaten and weary, but while there is life, there is hope.
Even the people wallowing in the worst of averos have the gates of teshuvah ready and waiting to open for them. Sometimes people have to hit rock bottom before they can begin climbing up.
That said, such people need to be treated with love and patience, but there is a very fine line between caring for them and exposing one’s own family and loved ones to them. There’s a time and place to cut off contact for the safety of others. Such things should be discussed with a competent Rav.
Finally, I want to say that the Tanach clearly illustrates that Hashem has been moving through the world, searching for people who want Him. Those who adamantly don’t want to do teshuvah and serve properly, well, they are lost to history. Any intentionally perverted worship of Hashem leads to destruction. Look at the Tzadokim, the Karaites, the early followers of Yoshke, the Shabtsai Tvists, etc. This is also happening with the reform and conservative moments; they are fading into the surrounding societies, disappearing.
Bottom line: A yid has the ability to do teshuvah no matter how far he has gone — if he wants to.
If he doesn’t, pity on him.