Have you done the calibration routine?
Your image doesn’t appear to be far from the norm. While these are pre-release early units, they are representative of what to expect.
More important are you able to place designs accurately?
Not reading a QRC can be an indication of a problem with the machine or as @Jules pointed out, depending on circumstances and materials. I had to get a machine swapped out because it was very blurry, no QRC detection and the design placement was way out of specs, more than the 1/4".