Should Ex's pay

My Ex-husband seems to be doing quite well. I have been married three times. I love my present husband very much, I would not trade my life now for a previous life...But: It irritates me why he can do so good now and why could he not do well when we were together. This is the story in 1997 I fell in love with a drug addicted convict. This was not my intention with life. We moved in with each other... He was sober... a year later I become preganct and he has a big high fall. In other words his drug addiction of crack was quite evident. I did no drugs nor did I care to. I was pregnact and the right thing to do was to get married, and so we did. We had a wonderful baby boy. I already had a child. I owned a home and he talked me into getting a loan on this home so we could fix it up, this never happened. Then my sister, brother-in-law, and my husband talked into opening a roofing business instead... I should have had sucker written on my forhead I regretfully conquered. I remember thinking "I really do not want to do this, but if I don't they will not love me." What a loser I was. Oh yeah I had gotten a small inheitence as well to combine. The business went very well. he was clean and sober for about a year. He made a lot of money. Then money started disapearing, and people started harassing me for unfinished jobs. He was at it again. I lost every thing. then he became very abusive. In the beginning of 2001 I left him for good. In 2003 I had to file bankruptcy. I tried for two years to keep everything together. I did not make this happen. Even when he was sober and working he would not help us. He was very abusive even after I left him. I married my present husband. There came a point that he became so abusive and drug problems worsened, that I requested supervised visits he refused. I took him to court for child support, and asked the judge to restrict his parental rights. he was becoming very dangerous. The courts decided that he could see our son through DSS. He refused. He owes us around $30,000 in child support.
Now our son is 9, my husband raises my son. My ex has not seen him in 6 years. My son wants to meet him. This cannot happen.
I recently found out that my ex was doing very well. He is sober. Just bought a new car. He is buying a house... etc, etc,etc...
So, is it Godly to go after him in Child support. Should I??? Why does this make me so angry? I am livid that he is doing so well, but yet he cannot support his son. I am livid that he can do so well now we before he could not. At least he could do right by our son. Atleast he could apoligize... something. God bless