I'm not sure about non-native speaker (user details are private right now) but his main crime is run-on sentences that just go on and on and complain and complain and accuse others of incompetence and use lots of exclamation points and BOLD CAPITAL LETTERS and is just pretty annoying in general and I have seen plenty of native English speakers write like this and it's usually the non-natives that can actually right correctly and I think I have explained the situation pretty well with this long sentence don't you think?
