Competency Gap Spider Chart reduce grid lines

Summary:

We followed the steps from the post below

but we still got some layout issues we want to resolve in the radar graph. We got a maximum score of 3, so we want to have 3 grid lines and no decimals. It now shows as follows, which is not as desired:

If we put the y1axis axismaxvalue to 5, it shows as below. We want the same result, but then with three lines and a max score of 3.

The advanced code of the graph is below. How should we adjust this to get the right layout?

<Graph depthAngle="50" depthRadius="8" seriesEffect="SE_AUTO_GRADIENT" graphType="RADAR_LINE"><LegendArea visible="false" />