Holist, your corrections weren't critique. They were essentially running the piece through a spell-check.
I did, as a friendly gesture, correct a few typos. This, I felt, was appropriate, because I was under the impression that impeccable grammar would be a good thing to have in this letter, the better to annoy the poor benighted recipient with. I also pointed out a sentence that in my opinion was poorly constructed, and offered a better-constructed version.
Maybe you haven't gotten the hang of nuance in this language, but you must know it exists.
Maybe you are also full of shit. 
I wonder if every 20th-century English language novel you've read has margins full of your notes on the grammatical errors the authors made?
Yeah, Joyce, especially, I ended up having to buy another copy.
Also you seriously need to drop this 'luck of the straw' point.
I think I have.
It's not an idiom just because someone has said it at some point. You made a mistake, it's okay.
I used some words in a clearly understandable, unproblematic, non-ambiguous manner. Well I beg your pardon, my mother is the whore.
It's like having a conversation with that Balkie guy from the 80's sitcom.
If Balkie did a fuckload of meth.
And had a brain tumor.
With a big dildo stuck in it.
