Dead posts are far from the majority here, and the vast majority are dead for a very good reason.
Grey posts just mean that some people disagree, but it does not really say much about the post itself. It might be that the tone was wrong, or the poster was being an arse. It does not prevent people reading it, and it does not prevent discussions about it. Grey posts are not a sign of persecution or a cabal against you, it’s just that it rubbed some people the wrong way.
You are interacting with a whole lot of people here. Some of them will have had a bad day or just be irrational. You don’t need many of these to get a net negative vote count. It does not really matter.
Which is a good point, but nevertheless I think that if one disagrees with a post (excluding the post breaking site guidelines), it is good culture to explain to the poster why one has done so.