I personally know 3 priests who left the priesthood to marry. They also left the Catholic Church.
I am concerned for them and hope that they regain their faith.
One of the greatest people I've ever met in my life to this point was a Catholic priest who left the priesthood (probably 20-25 years ago) after serving very admirably for a significant amount of time. He was embraced by Rome, for the way that he did it (with glowing comments from the Vatican on paper), and remained very active in the Church as a Eucharistic minister. He never lost his faith. He eventually married (years later, and not related to his leaving), and was a model husband. Amazing man.
On a separate note, one of the most inspiring priests I've ever known had been married and had two children. His wife was killed by a drunk driver, and he was devastated. He raised his children, never remarried, then went to seminary and was ordained. Amazing priest.