That's called depth of field and it's normal in everything except CGI. It's becoming more normal in CGI though.
Did a quick google:
"On a purely technical level, the reason the movie is so blurry is because the entire movie is shot wide open with vintage f/0.95 Canon Dream lens, giving it an incredibly shallow depth of field, soft bokeh, unique light artifacts, and potentially other aberrations depending on the condition of the glass. In fact, while most lenses have an adjustable aperture to change the depth of field and control for different light sensitivities, the custom rehousing
Snyder did for his dream lenses didn't even have aperture blades built-in, meaning the entire movie is shot fully "wide open." In more plain English, he used a vintage lens designed for still photography in the 70s notorious for how little of an image it would have in focus at a given time, enabling it to make the objects in focus pop more drastically against a blurry background and/or foreground, while giving out of focus areas of the image a blurry dream-like quality, thus the name, the "Dream Lens."