What do you mean with low culture?
Going to take a stab in the dark at this.
"Low" or "high" culture are typically two opposing types of rankings of a cultural work or artifact. Like, lowbrow or highbrow. Conventionally high culture examples: ballet, classical music, stuff you see at mainstream art museums, or even somewhat avant garde art museums, reading The New Yorker. Conventionally low culture examples: YouTube, comic books, hip hop, pop music.
If it has mass appeal - low culture. If it appeals to the higher classes and/or those with a higher than average level of education - high culture.
I don't know enough about Polina's LP music to say for sure, but it's definitely not highly-rated classical music. Pop meets opera or something like that, according to Wikipedia? It cold definitely be deemed "low culture."
I'm not sure how exactly Polina's skating is low culture, but I can see how her lack of speed, how she stalks her jumps, etc. are considered less than ideal. The masses who are uneducated about figure skating might think Polina Edmunds looks as good as a potential OGM winner. But if you're an educated fan with more knowledge, and therefore, more taste, you're not going to be as impressed.
Again, just a stab in the dark as to what the user actually meant, lol.
(FWIW, I think Ashley Wagner is the queen of low culture skating, and I mean that in the best way possible. The acting, the drama, the sheer emotion she brings and the connection she has with her music are wonderful to see for mass audiences. Combine it with her lack of skating skills, transitions, and sketchy rotations - "low culture" on ice.)