Should I exclude subdomain to receive better percentage of good urls?

[piernik]

I have big travel site. It is generally well optimised - it has 75% of good urls.
It has a separate subdomain "maps." that contains open street map with every placed well marked. That subdomain has bad CLS and FID times. I cannot fix it.
Is it worth to exclude that subdomain from google to achieve better percentage of good urls?
That subdomain has only 5% of delivered traffic, so it is not a big issue.

[lucy24]

:: uneasily wondering if “good url” is one of those techncal terms whose meaning I am expected to know ::

[robzilla]

No. Why would you give up 5% of your traffic? CWV scores are assigned to URLs, not to websites.

[NickMNS]

That subdomain has bad CLS and FID times. I cannot fix it.

I can't speak to the fid, but the CLS may be easily fixed.

...that contains open street map

I'm just guessing, but I assume that the open street map is loaded via AJAX, and thus is loaded after the main content of the page. If you haven't already, fix the height and width of the map's parent div such that when it is rendered it doesn't cause the page to reflow.

If that isn't the issue, Google's page-speed-insights or the lighthouse tool in chromium browsers are quite helpful at identifying which elements are cause the problems.