You're either a fan of the AC games or not
Having played ever AC game since II, some are great (Black Flag), some are good (Revelations), some I left after bugs killed my enjoyment (looking at you Unity). It seems to always depend on which Ubisoft studio created or led the development.
I've also discovered that you either a fan of AC, or you absolutely hate them, they are the marmite of the games world - I get that they aren't for everyone. I would assume, given the comments in the article the reviewer falls into the latter camp.
As for the "lore" and the animus, ignore it, it's seems less and less important in the reboot games (Origins/ Odyssey), than in the originals.
What I will agree on though is that Valhalla is a bug ridden mess at the moment, which is disappointing (and the patches have not helped so far)