Me too, am pretty slighted when people don't reply my comment because I took the time to comment. But from your post I now understand that it might not be deliberate if someone don't respond to your post.
But I know for sure that some people are just mean when they do not respond to your comment.
But for you I can say that you try your best to respond to all your commenters. You should be given an award for it. 😄
It is very rare i choose not to answer a genuine comment. It also depends on IRL situations