Depression is a horrible state of mind to be in, because it cuts us off from the outside world; which is where help can be found. The yelling is their way of trying to get you to "snap out of it." Anyone that has never been depressed simply cannot understand what you are going through. I remember that a friend asked me once why I wouldn't just be happy. As if I hadn't wondered that myself! In their own way, they are trying to help you, however misguided their methods may be.

Tell them that you don't need to be yelled at or called names. You are a good person and you don't deserve that. If they are really your friends they should understand that. Free to message or PM me if you need to talk.