There is nothing wrong with your posts. It's just that recently the understanding of what downvotes mean changed drastically in the community. I've no idea why

There is nothing wrong with your posts. It's just that recently the understanding of what downvotes mean changed drastically in the community. I've no idea why and when it happened, but downvotes now seem to mean "I disagree, but am too lazy to write a comment", instead of "your comment is not fit for this site and/or it damages the quality of current discussion" as it was understood before.