I've read that article and I'm sure it resonates with a lot of women. Particularly it resonates with domestic violence survivors. Your guess about why men are threatened by your article reflects your opinion of men, which is pretty low (and understandable given your experience). The commenters above have taken your experience personally, for whatever reason.

However, I don't think these men feel that marriage overwhelmingly benefits them, even if it may be true. Most men would like to believe that their wives benefit from their companionship. Show me a wife that doesn't benefit at all from marriage and I'll show you a husband who has failed her. Most men don't like the idea of being a failure. I know I don't. They probably feel the sting of that failure, even if they don't want to admit it. If you truly love your spouse, you don't oppress them and their happiness is important to you.