TNT butchered it. All the fans of B5 were only tuning in to the station to watch Babylon 5, and then all the fans of the other shows on the station wouldn't watch it. TNT decided they didn't like that, but just cancel the show outright. So they started putting up these insane demands that they knew JMS wouldn't/couldn't follow so they could cancel the show out of contract dispute.
Ehh, this is what *JMS* says... and he's very, very good at knowing how to blame everyone else for his problems. It's the same empty rhetoric you hae whenever a genre show is cancelled - 'this evil network was plotting against us from the beginning!'.
That doesn't happen, and it's especially disgusting here... since TNT decided to save Babylon 5 for the fifth season specifically because of its founder's personal interest in the show. It wasn't some brilliant scheme to lure the huge Babylon 5 viewer base to the channel... the was absolutely never any such thing as that.
The truth of the matter is that Crusade *premiered* to less than a quarter of the audience that Babylon 5 Season 5 opened to. It also wasn't very good - JMS likes to bitch and moan about how getting all sorts of network notes (a *standard* thing in television) which lead to the show being shown out of order...
but what he always forgets to mention is that there's no point where the show is secretly great. It's universally slow and boring - watching the original pilot (shocking horrible TNT change: the uniforms are different!) doesn't make the show any better... even the earlier intro movie is similarly dull. Crusade didn't have ratings share, it didn't have hardcore fan support, it had a creator who spent all his time bitching on the Usenet about the hand that fed him and just wasn't compelling TV - Turner would have been doing its shareholders a massive disservice by not cancelling it.
There was certainly no secret plot to make the show fail - a network can shut down production of a series whenever it wants in the process... especially a genre show with millions of dollars of assosciated production costs just to produce a pilot.
In fact, TNT spent a massive amount of money on Crusade and recieved a pilot they (and we, ultimately) didn't like. Instead of cancelling the show then, they spent *even more* money allowing JMS to retool the show... Which he happily did until he turned in a result that didn't please anyone - remember that, too! He didn't stand up and say to hell with the network for suggesting I change things... he didn't have a problem until *after* he was given a second chance and the show was cancelled. The cost of paying off a few producers half-season contradcts pales in comparison to what they wound up spending shooting/editing/promoting/airing for 13 hour-long shows.