I think the frustration is more on the “power imbalance”.
Most BLs often follow the same old heteronormative formula; Promiscuous/Experienced Top X Virgin Bottoms.
The things is, Dohyun was experienced in the novel, but what shocked the people is that it wasn’t just women, he had sex with men too. It was an independent post for Dohyun’s profile.
Iirc, his sexual experience with men wasn’t explicitly laid out in the novel, but was posted as an independent profile. And I think that’s what shocked them.
I personally am not a fan of the lack of representation for promiscuous bottoms.
It’s always just them being virgins, while tops just sleeps around.

Some pearl clutching bl Karen emailed a chat gpt generated letter to the author saying they were distressed and mislead by this story, all because they thought the ML was a virgin….they requested to change the contents.
To a manwha that’s following a finished novel’s plot…
The audacity is insane, purity culture for drawings and fictional characters