TV
You know, Hyde, at first I thought your father was a real dirtbag. But I’ve come to realize that there’s a fine line between dirt bag and Father Of The Year.
— Eric · That '70s Show

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This is a backhanded compliment. The speaker admits to once thinking someone's dad was a real dirtbag, then reframes it with a joke: dirtbag and Father of the Year sit right next to each other. It's teasing, half-praise that stays a bit insulting.
Context reviewed