f I sub to something I want to see new content every time I refresh lemmy,

That's the problem, lemmy's algorithms aren't smart enough to do that. Posts made around the same time tend to show up around each other. Particularly with scaled sorting, hot is a little better, but shows older content. As long as the posts are spaced out per community I don't think people will find it annoying. But like I said I had 1.5 pages full of just programmer humor posts. Back to back to back. And if I refreshed it didn't change, because lemmys algorithms are static.

Right now as I go to my default page 6/20 posts are orange cats. In a few hours it will be what other community a cluster of posts it decides to make.