It will never be consistent to people's satisfaction. Not everyone's... ANYONE'S. If refs make correct calls 96% of the time, the only part people will remember is the 4% that were messed up and the 20% additional that people THINK was messed up, even if it wasn't. Then they'll look at FT disparity and claim that it was unfair for their team. In a highly contested, highly emotional game with highly subjective rules, the refs will never come out looking good by more than 20% of the fan base. Every fan base thinks that they're being treated unfairly by the refs compared to the other team. The winners will stay 'Stop crying' or 'they're blowing call on both sides'.
Since THAT's the only thing that's consistent about officiating, then the only thing that can really change is our perception and reaction.
Don't let perfect be the enemy of the good. The goal should be 100% consistency, even i though it's not achievable. Just writing off terrible calls and not holding officials accountable for doing their jobs is not the solution. Software bugs are inevitable but you don't just throw your hands up and go, eh, i just need to change my perception of that power plant shutting down for a week. You take steps to mitigate potential failures in the development and operational processes to minimize their occurrence and impact.