There's no room in science for niceties. You need to learn to take criticisms less personally- stop being defensive and use what you can get out of it. So if I stand over your shoulder, and correct you, be thankful- nobody did that for me and I learned the hard way. (And yeah, there will be plenty of things for you to learn that way too) I am not responsible for taking care of your feelings or ego if I have to train you to be a competent scientist. Sorry. Grow up. Thank-you.
p.s: yeah, the posting won't necessarily stop, thanks to email ;).