Did you try any more expensive ones? If not, how can you compare? I don't think you know what you're missing. From my experience, you realize how bad cheap ones are is when you try something better. For example, I thought AKG Y20 sounded pretty good before getting the chinese TFZ series 2, which are just so much 'more'. I am aware that those tfz are also lower range (~45$ on aliexpress). I also own a pair of Beyer DT770 80ohm 100 eur headphones and those are something else, esp when I had a Focusrite Saffire to drive them. Of course there is a price point after which it gets harder to notice improvement. But only after trying out different types and price points do you start to understand what sounds good and what you actually like. For me, all cheaper ones just sound muddy or like the sound is trapped in some box or tin, and I also notice sounds and instruments missing in songs I know well.