That's how I feel about how it ended. I generally liked it, but yeah there really was no climax and it just petered into an obvious "next episode".
I agree. I enjoyed the movie a lot. But the stuff in the doctors office with Chucky taking Nicas body and Andy having a showdown with a Chucky in the padded room felt more like the ending of the second act than it did the ending of the film. Even with the re-introduction of Kyle, I felt like nothing was really resolved. There is nothing wrong with ending a movie on a darker note, with Chucky winning (it was done with Curse, after all). But there needs to be some narrative structure to it. This movie felt like a series of events, that took place in the same location and were all sort of related, but at the same time really added up to not much of anything.
I mean, even look at the characterization. The movie opens with Andy failing on a date before going home and spending the evening torturing Chucky. Why did this scene happen? Clearly the goal was to show Andy is damaged by his past. But how does his arc build off that and how does he progress, as a character, throughout? Andy, where we left him, is no different from Andy where we found him. Same with Nica (aside from being possessed). There is no growth, no arc. It even felt at times like the writers were trying to set up an arc between Andy and Nica, with Andys repeated attempts to visit her, he may have seen her as a kindred spirit. But nothing came of it. These little character moments just happened, but result in nothing. They exist to fill up time between kills, it seems.
I look forward to the next movie, but if the producers want to build mythology and an ongoing story (as this movie being a continuation of Curse, and then ending on a cliffhanger, would indicate), the writers need to have the movies tell an actual story, that is mapped out, and advances the plot beyond Chucky kills a new set of random people. Otherwise, the stuff with Andy and Kyle and even Nica just feels like filler instead of the story that the audience is supposed to be investing in.