Not sure we read the same paragraph cause pretty much all of these are reasonable.

• spits on the ground
  • disrespectful of other people
• can’t cook
  • lack of interest in self improvement, potential burden
• lies about his height
  • insecure and dishonest
• identifies as apolitical
  • probably a conservative
• doesn’t travel enough
  • misaligned goals/lacking interest in the world around them and in other cultures
• weird about other men wearing makeup (“like, K-pop idols”)
  • insecure/antiquated or traditional gender norms
• says he wants a “slightly autistic woman”
  • rude
• has no skincare routine
  • doesn't care about their long term health/potentially dirty
• likes songs that got famous on TikTok
  • no personal interests, tastes, or introspection
• doesn’t call his parents
  • this is the only one I don't really get as there are plenty of reasons not to call one's parents. I'm guessing they met someone who without a perceived excuse showed they had trouble keeping relationships with those in their life.
• sniffs every five seconds
  • annoying behavior with potential to grow into spite
• is an unsuccessful DJ
  • unwilling to pursue self improvement/unlikely to be able to care for themselves or others
• is embarrassed to do karaoke
  • misaligned interests/insecure
• he’s saving himself for marriage
  • conservative

Most of these seem like something someone they'd met previously did which led to greater issues down the road. They don't want to deal with it again so they've identified some early warning signs to help them navigate in an analytical fashion. Besides, at least this case is operating on a "3 strike basis" so if you have a steady job and just moonlight as a failed DJ you still have a chance.

I can't believe being a failed DJ made your list of unreasonable red lines.