I recently tasted a mead that was "infused" with a very low amount of citrus. The mead its self was very similar to a wine, the citrus gave it a mild acidic taste, but it did not suck.
I have to agree, it depends on the recipe, is it a straight mead, or is it a Melomel (fruit added)?
You can absolutely back sweeten, when not take a glass or two and add honey or sugar, a little at a time and see if this is more palatable to you.
The one thing I try to keep in mind is that we all do not have the same taste and preferences, the great part about making our own wine/mead/Melomel/cider/beer is that we can tailor it to our own tastes.
Experiment and have fun!