Maybe, but that's pretty funny as the first two (and to some degree the spin off) absolutely were. They were great games that I actually went back and replayed after beating.
That said, I'm not going to blind myself to the fact that I'm not having fun with the game just because I enjoyed the previous entries in the series or because I'm a fan of the character.
It also has nothing to do with the genre choices as I really enjoy almost every quality racing game (arcade or sim) and love car combat games. This just feels like a bad one to me. One with a slick veneer and a noteworthy IP attached, but still poor gameplay at it's core.
Fair enough.
I didn't enjoy Arkham Knight as much as I enjoyed Asylum and City. I actually agree with most of your points (not 2, 6 or half of 4, but the rest have merit to me). But it's only a slightly disappointing game for me because it came after two near perfect experiences, IMO. It's just under a super high bar. But I didn't find it nearly as bad as you suggest.