Season 1s are great, setup, some payoff, a bit of lead into the overarching story. Then season 2 to X. The heroes win and then lose in the final episode, cliffhanger to next season. People get bored. Final season is announced and they wrap up the show.
I’m here to second the bitterness about Almost Human (the casting was perfect for the two main characters).
I’m also sad about Journeyman.