Yeah, I watched the first few of season 10, up to the Towelie episode. The original Towelie episode from season 5 is one of my all time favourites, but dude, this one sucked big time. That's put me off season 10 now so I havn't watched any past that. Love Cartoon Wars though. "Kowabunga, Motha****a!"
But agreed, it wasn't "funny but got stupid", if anything it was "stupid but got funny", I used to love the old episodes, but since the newer seasons have come out, they've been so much funnier, and the style is so different it's not even really the same show anymore. The new ones are pretty much the sharpest political satire and social commentary around, as opposed to the earlier ones which were really just crude toilet humour. The seasons pretty much break down like this:
1-3: Toilet humour (but very funny toilet humour)
4-7: Ridiculous, crazy storylines with a bit of social commentary thrown in
8-10: Pretty much pure satire
5 and 6 are easily my favourites, as they combine the best of everything. I love them all though.