Season 4 was the worst

The character were themselves and the humor was there, but...

1. It didn't really have much new to offer.
2. Some episodes were kinda slow, like DethDinner.
3. While the 11-minute format worked perfectly when the show was (mostly) just all about hilarious random nonsense, it didn't work coming back after season 3 since the writing suddenly felt a lot more rushed and some episodes ended abruptly.

Honestly, season 4 was really disappointing. I still thought it was good, but nowhere on the level of season 1-3. Hopefully season 5 arrives and has the show being stronger than ever.

Still, even if season 5 turns out to be worse, I'll always love this show.