You know, this whole "Season 16 hatred" could very well be because, let's face it, Arthur has worn out it's welcome: it is now the second-longest running animated series behind The Simpsons, and people are definitely tired of the new Simpsons episodes, they're ready for that show to end. Same with Family Guy, people are tired of it, and want it to end (even Seth MacFarlane wants it to end). People are probably tired of Arthur and want it to end as well.

I mean, in my personal opinion, they've taken this show even farther than it could go, most of the stories anymore are either pretty weak, or in some cases repetitive (case in point, we've had two plots involving D.W. having a hard time getting rid of her hiccups, and now we've had two occasions where the kids put together a mock trial... maybe even three times if an Imagine Spot counts). It's kind of a common acceptance that when a series starts to repeat storylines, then that's a clear sign it's gone on too long.