Coming on very strong
There’s a science to flirting over text, and this guy is doing it wrong. You must initially convey something, then wait for a reaction. That’s simply how texting works. If someone doesn’t reply after several texts, you should take it as a signal that she isn’t interested.
This individual, on the other hand, did nothing of the sort. He contacted her in a hostile way several times, asking to go out with her and even producing a song about her! When she finally responded, she did it correctly.