Why are you still bothering to even go there?
Save your mental energy for nothing but your recovery and positive thoughts.
Not gonna get either of them there.
And in regards to giving him a piece of your mind......as someone who's been online in this environment for almost a decade...it's not worth your time man. Who gives a shit what he thinks. Your best revenge is to just stay away, recover, and never look back. Live a life he wishes he could. Guaranteed he'll probably still be there, suffering, waiting for a magical cure that's never going to come.
That is the highest road you could take my friend.