bump map detail

when I increase the render resolution the bump detail becomes to much not smooth. I made the bump from the color jpg in ssbump generator and remade the bump map many times with more and less depth and blur and the results are always the same. I made the bump from the color map jpg so as to match.

On the legs where the scales are compressed I’m Thinking about using the color map as map to sculpt a plane but this is so much work for a test.
Any ideas on how to fix this?
Thank you