First, I'd like to start with the condition that QM doesn't harmonize with relativity, so I personally treat any of these theories as different zoom in and out of reality. All theories use certain simplifications because neither people nor computers are able to get the complete picture - it has too many levels, dimensions if you like, depending on the chosen variables. Thus, we need to keep some variable fixed or their behavior linear to be able to see how the rest are progressing.
Some assumptions of QM contradict... reality. Fx, relativity which states that spacetime substitute space and time, is based on the notion that everything is connected, while QM uses the uncertainty principle that there are random events in the universe.
If we imagine reality as a disordered Rubik's cube, then there are many ways to look at it, and we tend to call one perspective subjective, but none of them is truly subjective because it gives you a correct picture from where you stand. A realistic interpretation/extrapolation would be to understand how your perspective is formed, how it relates to other events - the more events you include the more complete and realistic your picture becomes.
You are welcome to define objective and subjective but I'm convinced that subjective is just an isolated case of objective reality. In fact, the latter wouldn't make any sense if we exclude the former