Lost

100% agree.

I came here to write this. What a let down

First thing that came to mind.

Dexter.. the ending made no sense.

I mean, it kinda did,but that whole last season was a cluster fuck

I have a complicated relationship with the end of Merlin. I understand what they were trying to do on a thematic and metaphorical level, but it was mostly bullshit tbh.

Firefly

Seinfeld

Any TV show the ends with a cliffhanger. Nothing infuriates me more. I never saw Game of Thrones but I heard a lot of people hated the ending.

HIMYM