Does Marvin Lewis deserve to be a Head Coach (Bengals)

I wont lie, Wesley Crusher thread inspired me to do this.

So if you click on his thread:

IMDB2.freeforums.net/thread/57909/125-wins-zero-playoff-record

Marvin Lewis is only 7 games shy of a FN NFL record without having 1 playoff win!


118 Marvin Lewis (bengals)

So I ask, should he still be a HC in the NFL, or be the Bengals head coach? How long can a guy go without ONE playoff win?

Thoughts? 
PS - TY Wesley for your thread, Id never made this one without seeing that one.