You just got some tough love there. Probably doesn't seem like there was anything "loving" about it, but I'm just gonna send a wish your way, hoping you listen to what Steven had to say and keep your chin up.
I'm speaking from experience, as I too have been on the receiving end of Steven's red ink. On the bright side, you got it for free, whereas I paid for it. (And it was worth every penny.) But really, how you respond to this is going to say a lot about yourself and your future as a writer.
Was Steven hard on you? Yeah. But he's stated from the very beginning, that he isn't concerned with you or your feelings...he is only judging the work. You know who else isn't going to be concerned with your feelings? The reader. You will be judged solely on your work, and rise or fall based on its quality.
Dan, I commend you for being willing to have your work scrutinized in public in this way, and hope you take on the challenge of improving your craft.
And Steven, while I know you like to have your columns done several weeks in advance, I hope you'll give Barri Lang, Paul B. DeBerry, or any other future Proving Grounders the opportunity (should they choose) to polish up their scripts once more before you edit them, taking into account this week's column.