I agree with everyone else who has already posted. I think we are all saying you can transfer for valid reason. Social issues are valid but not the “parties aren’t that good” type social reason.
Perhaps something along the lines of. “After enjoying a wonderful semester at this fine school, it has become apparent to me that I would benefit greatly from a co-educational environment. This is not to take away from my time here but more about the opportunity to engage with a wider range of students in my major. “ just an idea on being thoughtful. It’s kind of like leaving a company. The new company wants to know how they would be a good fit but no one likes it when you speak down about the last job. And bad vacation policy or holiday parties is quite different than a legitimate cultural fit issue.