I know this will invite downvote:
because I see AND feel plenty of hostility.
Going through new answers on StackOverflow, I see many anonymous down-votes or negative messages without purpose. I've experienced them myself on Meta.
On SO, I have voted to close 100's of questions. Whenever I felt a question could be salvaged, I left a message... being willing to reverse.
Similarly with down-votes, I leave a message with (I hope) constructive advice. Whenever the OP has revised their Q or A, I've been willing to reverse the down-vote and even up-vote when deserved.
I don't see that as often. What I see a lot of is schadenfreude, manifesting as "joie de down-vote". And I have found it to be rep-based. For example, I don't face similar treatment on StackOverflow.
But I often see decent questions that need a little work nuked into oblivion without seeming care.
We junior contributors can be so much more helpful if given guidance. It's no one's duty to do so, But I feel it would make for a better community.