It’s painful because I love my spouse in every way. I am always respectful and supportive of their professional work.

If I show an unusual inspiration or spark of creativity which I am proud of, they instantly find fault and say it’s not a good or valid idea.

Spouses are supposed to support each other. Is your spouse equally successful in their creative and work endeavors? If the answer is no, they may be jealous of, or threatened by, your success. They could also be insensitive about how their remarks affect you.