It’s unprofessional but I can’t exactly blame him. I don’t mean to imply all criticism of this movie is invalid, because I don’t believe that. But so much criticism of this movie is absolutely brain-dead (be honest, yes it is), especially at the time. This person specifically is obviously not exactly a deep thinker and it’s hard to imagine this person would be acting in good faith if Rian Johnson had.
He was acting in good faith in the last quoted part, Rian still kept screaming about his dick. Would you respect a 50 year old man screaming that, even if “justified” because some 20 year old insulted his writing?
Really, though, that’s not the point; it’s still embarrassing and childish regardless of circumstance. There were many other examples; it would just take a lot of inordinate amount of effort and time to dig through his long-deleted tantrums. Disney definitely clamped down on him fast.