I'm not sure if this reply was intended to come off as a snipe or if I read it wrong . . . if the former, I think it's really unwarranted. It doesn't sound like Aradia was at all mean to him personally, but is using this forum as a place to share some honest feelings.
Personally, I find poor spelling and grammar cringeworthy as well, but if someone can't help it, that's one thing. To shrug it off? That would be a turnoff for me as well. (For context: I once dated a guy with very bad dyslexia and of course never judged him for his atrocious spelling.) It was also only one comment among others, the overall takeaway being that there was no chemistry. It is what it is.
I also don't get the high ego comment. Is having healthy self-esteem and knowing what you want a terrible thing? Aradia has also shared plenty of her struggles and I don't think she comes off as snooty as all. JMO.
Aradia, to you directly: I lurk here regularly but never post, so I suppose I'm overdue chiming in that I really appreciate your posts. I've set myself a deadline to get a profile online this year and start online dating, and it scares the shit out of me. I've loved following your adventures.