I had the same sort of experience. I'm not sure I really enjoyed it all that much up until the final quarter of the game and once I'd completed it I kind of wanted more.
GoW is rather uneven and I've always thought it was a bit overrated but I started to appreciate it more after playing Ragnarok which not only repeats some of its mistakes but also adds a fair share of new ones, including incredible amount of hand holding, treating the player like a dumbass, weird level design with completely nonsensical puzzles repeated ad nauseam and plot problems.
Yeah, it's easy, cinematic entertainment, you just push through, unable to die when climbing massive walls (which was supposed to be exciting I guess) because the game doesn't let you put a foot wrong outside combat, command jumping, command everything, some combat in between, walking sections, marked paths, yeah, been there, done that. Some cinematics bits, good graphics and there you have it.
It has its moments but 2018 is stronger, I could give it an 8/10 overall whereas Ragnarok would need major changes to half the game to jump from 7/10 to a consistent 8/10, let alone a 10/10 masterpiece. There's a lot that could be said about its problems, though it does have a few very good moments I liked.
Overall, I find it hilarious that the original trilogy were just hack'n'slashers but had deeper mechanics, puzzles and gameplay choices than the new games.