Roll it back and add a comment as to why you prefer your wording or better, make a second edit to keep the good and further refine things you feel could be made better.
In your specific case, I edited it quite severely since it was a rant and they get flagged and closed more often than not, but as the author of the post you generally get extra leeway in how a post reads. Who cares if people are livid - the emotional state of others on a chat board or even one person's frustration rarely add value to a question on the site so we do edit out rants as a point of policy. I did leave in the "livid" part to indicate that you were frustrated and chose those words to characterize this function and your view of it.
Since the site is edited collaboratively - you should expect a back and forth as well as be open to what the regulars consider "good form" when you are new to a particular site.
Just click on the edited... link to see revisions and comments as to why a particular edit was made...
Do let the faq soak in on the part about being comfortable with others editing your words.