Please understand that Google will largely ignore sitemaps if a site can be effectively crawled. Google will compare what it can crawl with the sitemap to ensure that it can properly crawl the site.
A sitemap is only necessary if a site is extremely large, the content cannot effectively be linked, or if content resides behind a paywall or login.
If you submit a sitemap without the pages with low or negative scores, Google will continue to crawl these pages and not complain at all. However, this does not solve your problem. (I assume.)
If you do no want these pages crawled, you should mark the pages noindex. Otherwise, I would not bother with a sitemap at all. SEOs like to suggest creating a sitemap, however, a sitemap has nothing to do with SEO. Many SEOs parrot junk advice and do not understand search technology enough to give proper advice.