I would have to say that internet dating doesnt allow for that "gut feeling" that we have when first meeting someone. Its well known that humans can make their mind up about someone from a few seconds of meeting them. Within that also is the fact that your head is doing the typing but your heart is saying "Run for the hills!" when you meet them so perhaps trying to put your heart and head on the same page is not something that is going to happen internet dating.
I would also perhaps say that because you questioned whether you had PTSD and didn't recognize that there are clear signs of abuse from this man...well perhaps that could all do exploring with a decent counsellor.