I was speaking mostly based on intuitions, but here are two quick sources I found which illustrate it:

a) Reddit is overwhelmingly male:

- Distribution of Reddit users by gender: https://www.statista.com/statistics/1255182/distribution-of-...

b) Reddit is not that big of a platform in the teenage demographic:

- Distribution of Reddit app users by age group: https://www.statista.com/statistics/1125159/reddit-us-app-us...

- Popularity of Reddit in teenagers as compared to other social media platforms: https://www.statista.com/statistics/250172/social-network-us...