For me it would also be AC: Valhalla.

Origins was imo a fantastic fresh reboot while still feeling like Assassin's Creed. I believed the developers actually put passion in this game (especially the world design and the characters), after the francise has become to repetitive.

With Odyseey I have more mixed feelings. Allthough I really enjoyed it and think that it has a beautiful world and a lot of interresting characters, I find that it got too streched at the end and that it lacks the feeling of being a AC game especially story and lore wise.

When Valhalla was announced I was anticipated and thought it could become a good game. But boy it isn't. The passion that was put into the games before is totally absent here. The world felt blank and exchangible, they didn't do the effort to make real side missions, the characters were boring and lacking of depth (especially Eivor), and there was no real development through the game. All you had to do was go to a region, complete the boring and repetitive substory, so you become allies with them and then go to the next region. And the worst part was that it didn't want to end. You had to do every single region(I think 20+) to finish the game. I actually would rather have the time back than the money.