See, I don't think it would have been so bad but for the fact that The Odyssey doesn't have a concept behind it that most people are interested in, like a typical Nolan movie might, coupled with (IMO) a lack of crazy good star talent.
Oppenheimer, I think was floated a lot on Cillian Murphy and RDJ. If not for them, it might have shifted the timeline of "Nolan's first real flop" to the left.
Also, I think because prior Nolan movies tended to have innovative or at least different takes than the normal Hollywood movie. Even his takes on Batman when they were poorly thought out (TDKR) seemed more elevated than most movies.
This...this seems like it doesn't have a Nolan-grade hook to get people interested to squash all of the "haters" (it happens...The Shape of Water was not Guillermo del Toro's best work, but it had a decent enough concept that most people barely noticed that the heroes were a disabled woman, a black woman and a gay guy; with an eeeeeeevil white man front and center; it got more laughs as an ode to "fish sex" than it did as "woke");
Point being, I'm a defender of Nolan's work, and even I'm looking at this like I already know it's going to disappoint me. And if he can't convince someone like me, good luck getting people who aren't staunch defenders of his on board.