For one it's way too big, it overstays its welcome by a large amount.

I despise that someone - an important character - is kidnapped, and then I spend absolutely ages before I can do anything about it. It's set up like we need to rescue them urgently, but we end up spending half the game before doing it. I can't remember the name of the woman who kidnapped this person, but it seemed like there'd be a lot of info around her and that she would be interesting, but I don't remember if there was because there was like thirty hours of gameplay between meetings with her.

Also the whole gods link is just clichéd and boring. Drop it and get back to assassin stuff. As if the games weren't long enough already.

That's the biggest issue actually. It's not that it's too long, the combat is annoying but it isn't the worst ever, the barred doors are a scourge designed by a psychopath with no concept of what fun is, but the real issue is that it doesn't respect your time. It takes as long as it can get away with to do everything, it's stuffed with superfluous rubbish and some of the shallowest side quests I've ever experienced in a game. It forces you to gather outrageous amounts of resources to upgrade equipment and then really expects you to care at all whenever you find a new piece of armour even though it being at all useful to you is on the other end of upgrading for hundreds upon hundreds of resources AGAIN. It relies on cheap drug excuses to get away with giving people magic fucking teleporting powers in the middle of combat for more artificial difficulty instead of designing a satisfying fight.

I completed all the DLCs in Origins and Odyssey, I never finished Valhalla. I did the basim bit towards the end and went "oh for fuck sake, it's not finished!?" and just uninstalled it.

I could've gone on forever about how disappointing this game is back when I'd been playing it more recently, but unfortunately this is all I can remember as the game is pretty forgettable.