Why is this happening?

36.4% of US male online daters are now resorting to anabolic steroids & bulimia to compete.

Researchers surveyed online dating users and non dating app users in the United States. 33% of the men in their survey reported using online dating. Of those that did, 36.4% were users of Anabolic Steroids (AS), as opposed to only 3.8% of non online dating men who reported AS use.

The portion of those surveyed who identified as "African-American" were the most likely to use AS (Odds-ratio of 3.665) followed closely by Hispanics (OR 3.413) compared to Whites. The overall odds-ratio of a dating app user to use AS compared to a non dating app user was 26.926.

For men using online dating vs. not using online dating, the following prevalence of behaviors was identified:

Anabolic steroids - 36.4% online dating, vs. 3.8% non-online dating

Diet pills - 40.2% online dating, vs. 5.0% non-online dating

Laxative use - 41.1% online dating, vs. 7.6% non-online dating

Vomiting for weight control - 36.4% online dating, vs. 5.3% non-online dating

Fasting for weight loss - 54.1% online dating, vs. 27.0% non-online dating

Muscle building supplement - 49.8% online dating, vs. 18.1% non-online dating

All behaviors listed were dramatically more common in men than women, despite common portrayal of eating disorders as "female issues". Specifically, for example, vomiting for weight control (bulimia) was found in 22.4% of female online daters, and 36.4% of male online daters. Thus male online daters are 1.6x as likely as female to have bulimia.

https://jeatdisord.biomedcentral.com/articles/10.1186/s40337-019-0244-4#Sec10