Why do you think the celibacy rate has risen sharply in young men over the last decade, but remained constant in young women? They both have access to the same entertainment options.
I suspect it's because women can now be far more selective about the men they sleep with.
In a single word - Tinder.
Because of the blue pill red pill movement and incel culture
I think you've got cause and effect mixed up there. "Incel" stands for "involuntary celibacy". That's not an explanation, that's a description of the thing you're trying to explain.