We just can't get enough of 'nice guys', they are just so meme-worthy. It's all about tipping the hat, saying m'lady, and being extra nice to women, all the while trying to get laid. Everything goes well till they 'propose' and the girl says no, then the real creepy a**hole comes out. The plot is always the same and that is kinda what happened here too. 

Ruin My Week wrote about the incident saying, "A guy named Keegan texts someone a cheerful, “Good morning” to another person who doesn’t know who they are.
“It’s Keegan? From last night,” he tries to remind them. He’s looking for a woman named Sandra who he thought he had fun with the night before. But Sandra didn’t have fun, and she gave him a fake number."

"That’s when Keegan reveals this is a theme in his life. He writes, “I can’t believe this happened again…..”

"The person who is not Sandra messes with Keegan for a while, at one point pretending it really is Sandra, but that she was “testing” Keegan. He does a complete 180 and apologizes for using some profane words referring to female anatomy. “SIKE this still isn’t Sandra,” the receiver replies. “F—K YOU,” says Keegan.

"It is almost mean, except this dude has clearly been creeping out women all over the place. Nice Guys do finish last, because everyone knows to avoid people who announce how nice they are instead of being, you know, actually nice. Good escape, Sandra," the article said. This is what we meant. Also, notice how the universe never fails to send out a PSA every now and then about nice guys through stories like this.