HI! and Happy New Year!
So, he has bad credit has not much to show for 50 years, married you and now you say he's jealous of your happiness /success? You added that you married for the wrong reasons (or were rushed at best) and you are really wondering what to do?
Sorry for sarcasm.
He should be proud of you.
You should NEVER EVER EVER feel guilty for being in a good place in life and happy.
My opinion. ( as I read only your side) Is that he needs to figure our his issues QUICKLY or you need to CUT it almost as quick.
He is not there for himself and simply demands your time. Argh this does not even begin to ask what is he doing (or could do for that matter) for you?
Oh and last thing.... next time, don't worry so much about yer parents and make sure you are doing it for the right reasons, are ready and with a person who actually dedicates themselves to adding to your life... not sucking it from you.
Hope I don't come off as mean

Im really not!!
From your side of the story, he just really seems BAAAAAD.