Characters
It's not that I'm down on myself. Trust me. I stink.
— Tom Granick • Broadcast News

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker rejects the idea that this is low self-esteem and asks to be believed: the verdict is simply an honest one. Bluntly, they say they are bad, presenting it as sober assessment rather than moping. The deadpan bluntness makes the self-criticism sound like a plain fact.
Context reviewed