I've made a couple of edits either for enhancing readability or improving the formatting. They, however, have been rejected.
As an example...
https://math.stackexchange.com/review/suggested-edits/738568 — How come this edit not make the original question "even a little bit easier to read, easier to find, more accurate or more accessible"? That question has been closed because of its ambiguous and confusing wording. I just happen to come from the same country as the poster. Maybe this explains why I understood what the poster had actually meant. I edited the question in order to clarify the text and improve the formatting, but it was rejected. Note that $1$ reviewer approved the edit; $2$ other rejected it.
Taking this particular example out of consideration...
the reviewers are also human beings just like anybody else. And, it's human nature to make mistakes. Everyone makes a mistake then and now. Now, one of them might not be paying much attention and do a faulty review. My question basically is:
If I think any reviewer committed a mistake on his/her part, how can I voice my complain against this? Is there any way I can do so?
Sadly, there isn't any medium to react to an edit review at current. See http://meta.math.stackexchange.com/questions/11116/what-to-do-when-my-proposed-edit-is-rejected?noredirect=1&lq=1.
Following what rschwieb said, I proposed a similar edit to the exact same question. One of the reviewers, who rejected my edit before, approved it. This time I tried to keep the OP's wording as much as I could. Yes, you were right—broad edits are not usually favoured (and for a very good reason). Thanks to all those people who helped me understand the reviewers' line of reasoning.