These shows are prime examples of how NOT to end a series.
Toggle through the worst finales in TV history now.
The Good Wife
The Good Wife left many storylines hanging. But it also reverse-engineered a slap that didn't feel earned, leaving its main character in a terrible position and painting her in a negative light. The creators admittedly had the final scene written months ahead of time and didn't do a very good job of building up momentum (or logic) leading up to it.
Sons of Anarchy
Talk about dragging out the obvious! The Sons of Anarchy finale was two hours for some reason, despite very little happening and the ending having been forecasted for weeks on end. We never thought we'd say this about SOA, but it was just boring.
Sookie helped Bill kill himself because he didn't think she could live a normal life with him around. So much for true love. And for the notion of True Blood as a wild and crazy series who definied "normal" in its own eccentric ways.
How I Met Your Mother
How I Met Your Mother killed off the mother AND split up Barney and Robin. In a word.... why?!?!?
Dexter killed off Deb, left Harrison to be raised by a serial killer and turned Dexter into a lumberjack.
A happy ending for two couples? Yes. But Dan as Gossip Girl?!? Come on. Moreover, nothing could save the generally reviled final season(s).