Dear Mike Brown: Please Fire Marvin Lewis, then kill yourself.
Why? He is doing a fine job. Think of it this way, not many head coaches could loose their star QB (who had only ever worked for him) their star WR (who had been there the entire time he was head coach) and another good WR, then use a rookie QB/WR combo to get into the playoffs. He is also the winningest couch in Bengals history, and he has stayed head coach longer than any other coach in Bengals history. Next year, he will have a QB/WR combo that works very well together, and thanks to the Raiders he has some very nice draft prospects.
If anything, Mike Brown needs to let someone else handle [censored] and just sit back and enjoy.