I've recalled couple more.
Ash versus Evil dead. First two seasons were brilliant, I'd say second was better than first, but with third something went terribly wrong. I mean, yeah, show never had very strong plot, but it did enough, and in third season we get some old girlfriend of Ash in the first episode and 15 minutes later she is dead. Not even in a funny or parody way, she is just there to establish that he has a daughter and when it's done, she's no longer needed. Also, there is some new guy and to make it more obvious, that he is going to die, they should've made him wear a T-shirt with the word "expendable" on it. Also, for some fucking reason plot turned into complete drag, so I couldn't force myself to watch the third season. I wish Ash would have gotten the trilogy he deserves, but...
Prison Break. Well, can't call it falling out, because I finished original 4 seasons, but if you count that it's gotten fifth... Yeah, fuck that, it was getting worse with every new season, sometimes to the point of bringing characters back from dead with the most bullshit explanations possible and then years after they push this shit, that completely overwrites ending of the original for the old beaten "Michael, prison, run". The only interest I have in that shit is it's ratings, because really, who would've watched this?
Punisher. Well, second season of Daredevil can be called it's season 0.5, after all plotline about Frank overshadows Matt's plotline in the most of the episodes. Also, Frank had well enough character arc - killed some criminals, got in jail, killed the mastermind and decided to fight crime, right? Wrong! In his own series Frank is back to square one - has nightmares about dead family, has no weapons, haven't moved on to fighting crime and surprise-surprise, haven't killed all who were responsible. Also, now he has terrible PTSD from his time in Iraq, which he didn't have before in Daredevil. All of this for the plotlines about crazy ex-soldier, Micro's family and strong independent detective and her psychoanalytic mother, that take half of the runtime in a show about vigilante called Punisher. It was so bad, that I don't even think about checking season 2.