So I've noticed that there are a lot of streaming movies and TV shows that match a lot of these patterns:

• IP is announced. Adaptation of extremely popular series with existing fanbase
• IP is billed as "adult" with "mature themes"
• Producer/Director goes on a podcast and compares IP to "Game of Thrones" a few weeks before release. Said comparison treats GoT as an ideal to aspire to instead of a cautionary tale.
• Producer/Director also insults existing fanbase for some reason
• IP is previewed to critics, gets amazing reviews
• IP comes out, and gets high streaming numbers day one
• Writing ends up being terrible
• Plot ends up being surface level, with all the subtly of the original adaptation cut out. This somehow is true now matter how basic the source material may seem
• Acting is terrible. There is at least one race swapped character, who they also butcher from a writing perspective
• VFX is terrible, and expensive scenes are cut out
• Costumes are terrible to the point where everything looks like shitty cosplay
• There's a few violent scenes that are extremely gratuitous. VFX and writing are so bad that it's comical instead of jarring
• There are a few random sex scenes thrown in. The sex scenes detract from the pacing of the story, and are blatantly thrown in so producers can brag about them
• Sex scenes tend to focus on the female form. If men are involved, they all are hairless and look like boy band members
• If it is a gay sex scene, it blatantly written by women and for women with an extremely limited knowledge of men as a whole
• In a few days, the Internet erupts with needlessly vitriolic discourse about said IP.
• A year post release, the show is essentially forgotten.

In that context it's no surprise younger people don't like sex scenes. It's basically a canary for a low quality show and extreme toxicity.