As someone who really got into the franchise of Assassin's Creed after playing Origins, and also as someone who considers Odyssey one of my favorite games of last generation, Valhalla just ain't cutting it man.
This game seems like it is a definite step back from those last two titles. The biggest flaws for me personally are the fact that combat is not as exciting or loose in this game and that exploration is not as interesting either. The structure for the story is incredibly boring compared to Odyssey as well.
All you do in this game is go to a settlement or town and meet a few uninteresting and easily forgettable characters and then perform some boring ass quests for them before it all culminates in a one final battle with some of the worst assassination cutscenes I've seen from this series yet.
The game feels often like a wanna be Witcher 3 knock off, sans the magical and fantasy elements of that game, for the most part.
Then there is the loot system in this game. Its basically non-existent when compared to the last two games. I get that Odyssey had too much loot, but at least there was some exciting stuff once in a while in that game. We can't even have one handed swords in this fucking game.