Isaac is so creepy omg
Even after his chance to show any redeemable qualities after meeting him, he still acted like the same creep as the impression they had on him. He was totally in denial and had this stalkerish behavior about him.
I have experience with kind this behavior. Often it comes from being rejected so many times in the past, that these men take on a form of "confidence" where they become more assertive with woman they consciously know aren't interested; they choose to ignore the woman's hints pretending they're ignorant to them, while continuing to initiate contact with them in order to keep the illusion alive they're still a chance with that woman somehow.
It's not who you go to prom with, it's who you take home.