As I didn't see someone to voice it already here is my behavior:
Once in a while (every week or 2 weeks) I go to my profile -> activity -> votes -> downvotes tab and review the posts since last time I checked (color change when visited) to see if the downvote is still in line with the post.
Sadly, maybe 1 on 20 posts gets edited, and when they are they're rarely better than before (more details but still irrelevant, some more fluff around the question) so my vote stay as is. Sometimes it get even worse (ranting about the votes or comments) to the point where I cast a close vote.
So don't lose faith, votes on post is a long time bet, it can get upvotes on mid/long term if you really salvage it.
