I think it's a bad idea. Seeing a dislike, many writers will quit posting here for good. Medium is already hard for newcomers, having dislikes will make it even harder.

I don't buy it that dislikes will be given only to click-bait or misleading articles. People will dislike stuff, including yours, just because they can and Medium is still on the Internet.

But I get why you want to have this feature. I think the best is just close the article you don't like and move on.