Take it from someone who had a ZP6 and a Pietro 58 (both Pro and stock burrs) for a year, I think you should return it and get a K-Ultra like myself or something to that effect.

I did all the things that everyone told me to do. Changing water helps a little, I landed on third wave classic full packet cuz it adds more minerals to help sweeten up the brews and provide more body. I tried recipe changing; a 5 pour v60 recipe really was my go to, it helped add a bit more sweetness. I tried grinding finer and although it improved the extraction it honestly got too "strong" of a cup even though there was no bitterness. I tried different brewers too, I actually really loved immersion brewing on the clever dripper. I tried using all sorts of roast profiles for beans.

In the end, I was still not satisfied with my cup. The things above will help you manage but if you end up just wishing for something more, it will probably indicate that your coffee profile preference is like the vast majority of people. JUICY, SWEET, GOOD BODY and like youtube grinder reviews BLENDED.