Cliffhangers are fine, but wrap up your actual plot points (Dragon Prince)

I understand and respect that a show doesn't always know if it's going to get another season. I understand that sometimes everyone's favorite alien gets taken by the government in what's supposed to be a season finale, but oops, not renewed. But when you get yourself a FOUR SEASON ORDER, get your shit together.

The end of Dragon Prince was a mess. Macguffin magic items were brought in and then never used, major character decisions were made that went nowhere, and, of course, the show's always had very confusing morality, but mostly I want to talk about the part where the antagonists just sort of walk away.

We're given warning, well in advance, that killing Aaravos through traditional means will just let him revive in seven years when the stars align. Sure, okay... So they come up with MULTIPLE non-traditional means to handle him. Three different methods (one to fully destroy him and two to seal him away), and it's a major point that they need to get ONE of these methods to succeed for their victory to actually be a victory. Anyway, Aaravos gets eaten by a dragon. Meanwhile, Claudia's got this whole arc of going darker and the other characters, especially her brother and her boyfriend, have to decide whether or not it's okay to kill her. When the moment finally comes... ... she runs away. A four season, 36 episode arc, and nothing ACTUALLY gets accomplished, just postponed. What makes this stand out so much is that the first major arc DOES tie up most of its important stuff, kills the main villain, and solves the actual problem.

The sheer amount of stuff left floating in the wind after season 7 suggests an ASSUMPTION that another major arc would happen. Not a "it'd be nice to" and not a "we've got more story to tell" but a "Yeah we didn't bother finishing this story arc, the main villains are still out there, and everything's shit."

And then the writers had the gall to go and say "Stories are complicated things. The Dragon Prince saga has a very specific endpoint at [season] 7." No. I watched the end of season 7. That's not an ending. I can't recommend this show to people if it doesn't get renewed just because they don't actually finish the four-season story arc.

This is far from the only show I've seen things like this happen (Spider-Man just abandoning Mary Jane in an alternate dimension is kind of a notorious one), but most of the time it's a one-season order hoping to get renewed. Kaos was an amazing show, but without a second season the story just hangs in the middle. But compare this to Stranger Things. EVERY season of Stranger Things defeats the major threat. Sure, there's usually the tease of a larger threat out there, but the big one always explodes in the season finale.

...So I raise the question to you all: What shows do you think failed to finish their storylines to the detriment of the whole experience? No accidental one-episode cliffhangers like how Lois and Clark ends with them finding a mysterious baby or one-seasons orders that never got a second. I mean shows that had a storyline, had time to finish it, and just didn't.