Im not going to say that they are true or false, but there are certain things Im a bit critical of.
Such as: The many ketchup incidents that he mentions. Both Chad Laughlin and Sue Klebold only mentions one incident and that is the ketchup incident.
The bottom two kids at the entire school: It just doesnt sit well with me. Other accounts have argued that they were well liked by a lot of people.
Fight with TCM and the jocks: Recent withness accounts have argued that they were merely video game nerds.
Other than that, of course, the extent to which they were bullied is also hard to verify, but I think people way to easily take either Cullens or Browns word for it as evidence. Also, the tendency to cite any incident as evidence of bullying isnt right, and we shouldnt abuse the terminology bullying like that.
Other than that, I have yet to see anyone dispute that he met Eric in the Parking lot. Yet, I dont see why its relevant to proove or debunk this, either