Hi! Thanks for the tag. I'll tell you my vision of things.

First of all, I would say that not all communities are equal. For example, we at Discovery-it, being a very small community, carefully select the posts that receive curation. This is because the trail rating is not high and we like to focus on quality content, giving space first of all to new users who demonstrate their commitment.
A community that, on the other hand, is huge in size and has a high trail rating, surely can afford to support more people!

Unfortunately, on Hive I also noticed that a lot depends on one's friendships, but it is also true that each of us can do something to improve in this, it is not necessarily a bad thing. For example, if today you start following users you didn't know before, you will surely increase the possibility of interacting with them and, slowly, your circle of friendly users will increase.

Regarding the shit posts that receive the most rewards, there is also another important aspect. In fact, what may be good for me may not be good for another curator. This is how society works.

I hope I have been exhaustive, have a nice day :)