Another WA member is having his posts copied! So unfair!

Hey guys,
I don't know where to start, what I have just discovered is so unfair and wish something could be done. I guess the first step is to let you all know about this.
I've been discouraged for a while because I've seen my rankings drop too much, even for posts that have comments so I'm wondering what I'm doing wrong.
Maybe the fact that someone copied some of my posts (I wrote a post about this has affected my site negatively because Google doesn't like duplicated content.
I just had hope that Google would take into account the post that had been published 1st and give it higher rankings than the copied post.
However, I have just found out that it's not always that way. I was on Jaaxy doing some research and I have noticed that a WA member has got one of his posts copied!
I'm not going to mention his name or his website in case he doesn't want everyone to know.
The worst part is, Google has ranked higher the copied post than the original post.
I also noticed that this unethical website owner has taken advantage of this WA member's post to promote a high-ticket program.
I was really devastated when I saw this because it's really unfair and something that has happened to me as well.
I mean, I got at least 30 of my posts copied and even though I now have my content protected, some of my latest posts are getting low rankings and it's really discouraging, I'm trying so hard not to give up.
So I thought I would tell you about this so that you make sure you don't get your posts copied by an unethical person whose site is getting better rankings when you are the one who is putting in the work.
I will tell this WA member about his copied post and hope he can do something about it. I'm really tired of unscrupulous people who steal other people's work, they're no different than scammers who steal other people's money.
Anyway, I really appreciate everyone who took the time to give me some advice when I found out that my posts had been copied.
https://support.google.com/legal/troubleshooter/1114905?hl=en
They are very efficient about dealing with this sort of thing, and if someone is caught copying your content, they will be punished by Google.
One thing to keep in mind that may help ease your worry about copied content is that Google knows who the original publisher is of content. If 100 people copy your post, it's not going to negatively affect your site. If Google allowed this then anyone could just copy a site 10's or 100's of times and sink it's rankings. This is not the case.
Although it's annoying that people may be using your content as their own, they are not going to rank for this content and they will be punished by Google for having duplicate content on their site. The publisher and original author of the content is not affected.
As Kyle mentioned, a DMCA takedown could be useful to you.
Carson