How do I improve the quality of Apple News App Articles in my paid news feed?

I understand your concern/issue. I have greatly fine tuned my News feed by following the suggestions found in this AppleInsider article. It takes time, similar to taking time to block email addresses or marking them as junk to clean up your email inbox. But over time, I have seen remarkable results in my feed. For example, there are a couple "celebrities" who do not interest me at all. But giving a thumbs down 👎 to articles about them, I am finally at a point where I see almost none at all. Give it a try.

From: https://appleinsider.com/inside/apple-news/tips/how-to-customize-apple-news-to-see-the-content-you-want

When you open a story, you'll see an icon at the top of the article that shows an image for "thumbs up" or "thumbs down." Tapping that will open a pop-up that allows you to choose "Suggest More" or "Suggest Less," just like Apple Books and similar to Apple Music.

You can also rate a story without opening it or reading it if you want, by tapping the ellipses icon, which will pop up the same drop-down menu that has the "Suggest More" or "Suggest Less" options.

Similarly, you can also inform Apple News which outlets you prefer by following them, which will lead the service to suggest similar outlets. Or you can block a news channel if you don't want to see it pop up in your feed again.