Crappy acting. Bad animation. Cheesy music. Holdouts of a bygone era begging for attention. Spider-man entering to the cue of a foghorn. Dick Tracy's sexual innuendo. Reminder of the downfall of the old media with the rise of the interwebs that made the POE possible.
In answer to the question posed at the end: Because Charles Shcultz is dead, Bill Waterson is retired, and Gary Treadeu has been phoning it in since about 2004.