As a bisexual human, I like almost anything when consuming the pornography. But I can never find good bi content. It’s always some video that’s 20 years old and so over produced and acted that it’s awful to watch. But you can’t find any decent modern content with bi themes. Or its a gay/lesbian video wearing a cheap mask.
IMO, part of it is simply that most porn is 1-2 people. While there are ways to make a 2 person porno be bisexual-friendly (at least to me), it’s not common. But you’re right overall, the industry needs to step it up!