is it bad to wish bad on someone (only during the anger stage of the healing process)

When you wish your ex would die because he left you with a newborn and is now hoaring around with his new girlfriend only days after he abandoned you blaming you for absolutely everything. (Obviously he had her before leaving me). 
You start to google wondering why you get bouts of horrible anxiety craving to contact him as if he was a potent drug even if it means getting yelled at and called names like stupid maggot. Only to find out that he has without a doubt Narcissistic Personality Disorder (covert, the worst kind) who "love bombed" you in order to make you feel like the most wonderful woman on earth and get you to drop your guard then find out your deepest insecurities drain you of your money energy and life, then devalued and gaslighted you using the insecurities you had entrusted him with to confuse you and get you to second guess yourself make mistakes walk on eggshells and act crazy which he then used as his excuse to leave. 
According to Google he is incapable of empathy or any kind of love for anyone not even himself and apparently he was never himself while with me, he pretended to be what he thought I wanted in a man just to drain me of my resources. I never met the real him.
I don't know if to cry because I fell in love with someone that wasn't real or to cry because of how horrible that lie treated me after I gave him all I had to offer and then some because I'm now in debt.
I feel like posting a picture of the mother fucker just so all you women can see that even the most beautiful innocent of all smiles is capable of stabbing you in the back without warning.