You just have the wrong expectation of the OPN, that’s all. Like I did when I first got my OPN and nobody explained to me properly what to expect, including my own provider and the Oticon sales rep who attended one of my fittings. Probably because they didn’t even understand it themselves, believe it or not.
The OPN is designed to include all sounds you hear, including what you deem to be background noise. That’s on purpose. It’s not because it doesn’t know how to do it or doesn’t do it well. But on top of that, it also helps make you understand speech better in noisy environments. But you will need to learn to tune out what you don’t want to hear and focus on what you want to hear.
The best tip I can give is to make sure both your noise reduction settings for simple and complex listening environments are both set to max values. Then have a positive attitude about trying to tune out the noise and focus on the desired sounds.