Defamation to share disparaging survey comments with all employees

I work for the government in a union job in a senior position (with 5 others) alongside a class of ~200 employees. There was an employee that a year ago wanted one of our positions, didn’t get the job, and set out on a vengeance with the union and got the union to send a survey to all 200 employees. Some employees said very harsh opinionated things in the survey (I.e. I only got the job because I’m a favorite, I’m too young for the job, I keep my position against protocol, I am given favors from manager, I didn’t deserve my job). This type of criticism is understandable but the union took this survey results and comments and distributed it to all 200 employees. I now feel like any employee who reads these results will think of me in a different light and don’t understand why results wouldn’t only be shared with my manager.