Usually moderators don't need to be informed about a single bad edit. After all if it's your post you can simply roll back the edit.
If there's a pattern of bad edits
- a user is repeatedly editing your post in a way you think makes it significantly worse even after you've rolled back their previous edits
- a user is editing lots of other people's posts in a way you think makes them significantly worse
or the edit has introduced spam links, rudeness or obscenities then yes, moderators need to get involved. Moderators can send messages to users to ask them to stop and suspend them if their problematic behaviour continues.
However you need to take an "assume good faith" attitude to edits because moderators certainly will and if you flag posts where the edit is OK your flag will simply be declined.
Some people don't like their posts being edited but it's a normal part of the process here. People who are usually far more experienced in understanding what makes a good post here will often try to improve your post even though they get very little reward for doing so. Such altruism is to be welcomed rather than condemned.
The edit to this post for instance changes the link text so that it's more readable and we get more context as to what the link is and we certainly don't encourage more bold than is absolutely necessary in posts - i.e. usually none at all is best. So this is a useful edit. Ideally I'd like to see it use markdown numbering and the edit doesn't fix that but overall it's an improvement.
FWIW, if that edit was flagged on the site I moderate, I'd decline the flag. There's nothing here that needs a moderator to step in except perhaps to explain to you why this particular one was generally helpful, as I've tried to do in this answer.
ell.stackexchange.com
. The removal of the bold from numbers is subjective. But I also agreed with that edit because those numbers don't need to be bolded.