I tried to update the templates to match the release of 1.8.2. The entire problem with the mountains stemmed from the templates; there were too few objects defined, so the generator often filled the empty space with mountains. I tried to eliminate this issue. Let's test and verify:
https://my-files.ru/n0hbzf

At the request of the community, I'm adding a file to this post with a detailed description of the templates (where which objects are important, "why the hell isn't it working, and why are rainbows appearing in my eyes?", how to navigate, etc.).