Content Sized to Widget Box

The chart inside the widget field is not scaling to the field and condenses some aspects of the chart if I bring the field boundaries in, but will not expand larger than seen below. The "scale data" selection in the horizontal axis is grayed out, I cannot select it. And changing the font sizes does not expand the overall graph axes to accommodate, it just squishes/overlays the text labels so they become illegible. What's going on here?