I have no comment on sound mixing in general, but just to add context here, Chris Nolan intended[0] for the dialogue in some of the scenes to be inaudible over the score.

I think this is often difficult for people who treat films as logical instead of experiential.

Nonetheless, it is inaccurate to characterise it as poorly mixed, since the goal was for the score to somewhat drown out the dialogue, and the mixing achieves that goal. You can disagree that this is a desirable outcome for the viewer, but art is ultimately subjective.

0 - https://www.reddit.com/r/IAmA/comments/cjtlzp/comment/evg2js...