I've seen the same, my friend. It's best that you let it go and move on with your life.

After all, the best "revenge" you can ever have on anyone who rejoices in your suffering and anguish and wishes you harm is to have a good happy life.

On that note, take a good look around you and be grateful for everything, even the very breath that you take. Thank God that you are you and that it is their Soul that chose those particular paths. Choose wisely. Raise your consciousness above the "parasites" that you mention and the "hosts" that welcomes them. The Lord has plans for everyone, and you are merely an actor in this great play.

And remember my friend what I said about the "best revenge". Live in your Dharma, pray for the hypocrites that you speak of, that they may awaken before they receive their just rewards when their time comes.

Have a good sweet life that you enjoy and share with the ones you love, and don't worry, Justice will prevail.