Duh! This is what the finale was all about. They ARE unlikeable shallow characters. That's what makes it funny.
I certainly could relate to them more than I ever could to the fictional drunkards on CHEEAHS.
Duh, I thought the finale (the courtroom scenes, right?) was about cost cutting and cheating the viewers (and advertisers) that producers of long running boob tube shows do on a regular basis: save production costs (one cool million per principal actor, for example) by splicing together scenes from previously shown episodes and call it something like "the Fifth Anniversary Show", or in this case "Seinfeld Finale". (Although in this particular case they did engage the million dollar cast, but by confining all action to two stagesets - the courtroom and the holding cell - they still saved a bundle.) It's quite transparent, isn't it, which is why I think you'd have to strain to find any meaning in the dramatic wrapping that they put around such Frankenstein episodes, which only serves to allow them to string these clips together.