Just heard this on an ad for non-fiction crime-related TV series…
“Any man who uses a weapon against a woman is a worse of a coward.”
I’ve heard the phrase “a worse of” before (not IRL but on TV), but always as a comparison. e.g. “He is a worse of a coward than you” meaning he is a worse coward than you.
In the context of what the speaker was saying, in this case, no comparison was being made. Basically she meant “is the worst coward”, I suppose.