I can see why people love it and I can see why people hate it. People want different things out of a movie and John Wick 4 delivers exceptionally well in certain areas while being mediocre in others.
A quick summary is I had a fking great time watching it at some points and a little bored during others. The action scenes are fantastic. It's a TON of fun and really cool to watch. A little towards the middle of the film it did feel a bit slow and dragged out. Cutting out 15 mins would be perfect.
Held up by good action and decent laughs is the weak story. I absolutely LOVE the idea of the underground black market, the continentals, and the high table. I wish we got to see more of that world. I wanted more backstory, more exposure, more display of how they ran behind the scenes. Hopefully I'll get to see that in the Ballerina and Continental.
The other thing I think hindered the movie was that the idea of the high table got watered down. They started off as some serious group that mean business that you don't want to mess with. In John Wick 4 I felt like they were kind of a joke and not really as big as mean as people made them out to be. John Wick was just so broken in the 4th chapter. I know it's the whole appeal of John Wick but it does take away from the story and suspense when, even with suspension of disbelief, is just pure absolute absurdity. But that's also why I love it!
I swear John Wick can take more hits than some Avengers. He's like a tank with the body of Wolverine.
But regardless of what you're looking for you have to give it to the crew for how much work and dedication they put in to this movie. The quality really shows here. It's just really fun and exciting to watch. I rate it higher than the other John Wick films even though it's not my favorite just because in 9 out of 10 ways it's bigger and better.
But I love the other John Wick films because we got more backstory, more Continental, and more focus on story.