I agree with you, but that doesn't mean I'm going to stop watching. It is still better than anything else on TV right now. Also, I think there have been some good episodes this season. Who can have more fun? was hilarious and even last week on Who can produce the best commercial?, I was dying at the commercials Kenny made. Even if its not as 'realistic' as it was in the earlier seasons, I still find some comedic genius in just about every episode.
It's not as hilarious because it's not new and fresh anymore. Kenny's getting old and Spenny is just a complete retard. I still love every episode though and I think season 6 is brilliant.. something about those guys just keeps me engaged the whole time. I want them to live in a jar on my shelf, so I can just watch them all the time.