I didn't reply because I knew I will be extremely disgusted by anything he has to say.

This your disgust arrived late o, I was already disgusted when I read how he was selling your script 😂 you're very patient, I would have reacted much earlier as soon as I noticed his parasitic behaviour. Things wouldn't have gone too far if you had set up boundaries earlier, he realized you are someone who doesn't react quickly and he took advantage of that, very annoying mentality