[JSWolf]

The problem as I see it there's not proper way to filter what you want or don't want.

You want just self-published; can't do it.
You want without self-published; can't do it.
You want without Kindle Unlimited; can't do it.
You want just Kindle Unlimited; can't do it.
You want just Kindle First; can't do it.
You want to see just books with typesetting enabled; can't do it.
You want to search for books in a given price range; can't do it.

There is a lot you cannot do that you cannot do. What you can do is get a mess of a search result.

Searching is a mess across all categories at Amazon, not just eBooks.