Or they just have different tastes then you do, which is a far cry from having 'no taste'. People consistently prefer and rate headphones with more bass as more appealing, for example. That's why consumer brands are bass-heavy. It matches the taste of the market. If you need a flat audio profile where the mids and highs and bass are all at the same level you have to pick up a pair of studio monitors.
There is nothing wrong when it comes to subjective taste. However I think there is some level of objectivity to many things that can be applied to an extent. For example, if there is so much bass that much of the other frequencies are not audible, then I think it is an objectively bad setup. Or if your food is prepared with so much sugar/salt/fat/seasonings that you can't even taste the main ingredient, then it's objectively not very good (or at the very least, a waste of the main ingredient).
