People can be awkward and weird and have inconsistent moods and change their minds and aren't completely in sync with their feelings.

These are the complexities of actual human beings. "Dan" is a fantasy, and unfortunately, just like high-production pornography, serves to give false expectations to young people, this time mostly women instead of mostly men.

Quintin Tarantino said some of his films are set in the "realer than real universe". I think it just means when you watch it you are supposed to resonate more with it than real life.

'More natural than a real person' probably means the speaker finds real people harder to relate to, I guess.