I actually don't hate any of the first 7 movies.
I have some serious problems with 2 and 7, but I don't hate them.
That being said, the first act of 8 is by leaps and bounds the worst act in any of the movies by far. It was actually really really bad, like 1/10 bad. The only good thing I can say about it is that for the first time in like 4 movies the opening title cards don't have massive spoilers in them, but that's such a reach to say something nice.

Then the second act is slow as fuck for no reason. Who the fuck is this butch lesbian woman on the sub? I kept waiting for her to do something because they kept shoving her in and I was waiting for her to do somwthing. She killed that one guy and that was it? OK. And yeah I'm sorry but you guys are WAY overrating the Sevestapol sequence. I wasn't falling asleep but the music did the heavy lifting, not the story.

And yeah the 3rd act is just alright.
It's so weird to me how despite all exposition crammed into the movie, it still feels like stuff got cut down? Did anyone else feel like they were hinting at more with the doomsday cultists and that barely went anywhere?
Why these movies were not one movie is beyond me. Don't just say Money.