Peace first, then ...
Has anyone else experienced the same?
Nearly everybody ... as soon as you rank for something, someone else will scrap your content, and somehow rank higher ... Welcome to The Internet.
What can I do in such a situation?
The normal procedure, would be to contact the owner of the site, and requires that he removes your content, ... since his business model is based on stealing the content of others, there is very few chance that he minds your request.
So, the next step should be to contact the host of this site, and report the copyright infringement, if the host is a western company, this is possible that, if you provide enough evidences of the infringement they do "something".
Next, you can report the site to the registrar where the domain name is registered, or at the registiry level too.
You should also be able to report the site to Search engine, which might de-list it , eventually ...
This is the theory, in real life, most of this are rarely working ...
A counter measure is to try to prevent the scraping to occur, by identifying and blockin IP-IP Range from where the scapper is operating , knowing that he can use plenty of different IP, from different countries ...
Like some on this forum, I am trying to block all IP ranges which are belonging to Data centers, as well as blocking countries from where there is no reason someone wants to visit my sites. Also, I keep an idea on suspect activities.