Nah, most definitely not. Most people say it's the weakest, because the whole serial killer plot is rather unrealistic and some characters behave strangely. Personally, I still like it, though. But not the best by a long shot. (For me, it's 2. Bit of an uncommon opinion, though.)

1899, Firefly and The Mandela Effect.

Problem is, season 1 was still a little rough, and 4 a little rushed. Only 2 and 3 were absolutely amazing.

Because season 1 is great and better than 5.