I have been in a similar situation. Taking care and helping someone do things they should be doing for themselves. My advice is to learn to set boundaries even if it means that significant other falls on their face. Marriage is about give and take and having someone in your corner. It shouldn't be about having someone do what you are responsible for.

Have you told him how unhappy you are? In a direct way. Or have you told him what you want him to do to feel better about your marriage?

Some people constantly fail, lack ambition and need a fixer in their life. They tax the other person so much that the spend more time fixing the spouses problems than taking care of theirself.

If things are beyond repair then you have to take care of yourself and your needs first.