I understand your point. In general, in recent days there are usually topics that don't interest me, but hey, it's part of every forum. The "spam" will always be there, because this page does not have an interest-based content delivery algorithm. And where I found the filter is looking at the top of the day.

I know they are preparing $sub to put more order (i want ~memes)

About the preview page I think it is not difficult to integrate, but it would overload the SN servers since too many links are published per day. If you are concerned about your privacy, you can use DuckDuckGo and some VPN to visit unknown links.