Long rant!!!

Let me give you a little back story first

So I was building a mobile app for a client who is to say the least a big PAIN IN THE ASS!
And once I completed the final edits he requests and sent him the app for approval, he calls me and starts asking about some features in the app if it has does or not (which the app does). The main reason for this rant is the feature about the app being able to open the links of the website inside the app without going to the browser first.

But what was happening when the client clicked on the link, since it’s a newspaper type of app, he got asked in which browser he wanted to open the link and after the browser was opened it returned him to the app and asked if he wants that link be opened in the app or browser again. So I can understand his confusion and anger with this problem so I started to debug to see what is happening since I now this featured worked before and had it on video to show it does. After a few minutes I noticed that the links were being added as google.com/url?q={CLIENT_URL}/something_else instead of just www.client_url.com/article

Obviously not my fault as I don’t do content for the website but some other person. But once I called him back and explained the situation to him, he started yelling at me for not being able to create the feature and not notifying him of the mistake his author was making. After about 10mins of him yelling I snapped and just angrily told him “I don’t hear any problems with the app, as far as I’m concerned it can be published as is, as there is not problem on my side”. Then he got even more angry and started talking more shit about how this is all my fault and how I’m a bad programmer and how his users are gonna just delete the app once they see this and I should find a way to fix those links.

And to clarify some more, if there was like 5-10 articles I would do it, just so that I don’t have to listen to him, but there are more than 1 or 2k articles with about 2-5 links per article that were added like that.

After his call I called my boss and told him what happened, and he said he will talk to the client and explain to him how he will be able to communicate with me from now on and in what tone. As I’m not allowed to tell clients anymore to go fuck themselves, since I did it once. But I can call my boss and he does it for me :D

//END RANT !!!

I need some advice, because I'm feeling like I'm getting ripped off by my company.
I'm a junior developer and this is the first company I've every worked at. I've been here for 1 1/2 year. I said in the first interview that I am proficient with a fullstack framework, for a rather niche programming language, but I don't want to do front end, because I'm not good at it and I generally don't like it.
I'm the sole coder working on a project that costs the client 100EUR/h. There are others, but they just organize the tasks I have to do. This project requires me to work a full stack of retardation server, that's a pain in the ass, not really compatible with this project and required hack after hack to be fixed. Finding bugs in this pile of shit often takes days of emailing around and asking for logs in hope something might pop up. I've had to scavage through threads saying the still bleed form the anus or have PTSD, beccause of this retarded stack. As you can imagine, I'm also responsible for all of the QA and obviously get shit for bugs. I'm supposed to remember every little detail I've done in this project at the end of the sprint, while also working on 2-3 other projects simutaniously.
I've developed some small servers with dashboard and api for apps on my own. I'm supposed to also do all of the QA so that my boss doesn't see any errors, because otherwise our clients have to be QA.
I have written a complicated chat system that is distributed across nodes. We've nearly missed a deadline of 6 days for this shit, because I've been put under preasure, because I estimated such a "large" amount of time for this.
Other things I've done include:
* Login/Registration on many projects
* Possibility to add accounts for subordinated, with a full permission system for every resource
* Live product configuration with server validation and realtime price updates
* Wallet & transaction system, dealing with purchases of said product and various other services offered on this platform
* Literally replaced the old, abandoned database framework from a project with a modern one.

I've made some mistakes during the WFH corona times, but this that doesn't mean you can put more preasure on me and pull stuff like this: https://devrant.com/rants/2498161 https://devrant.com/rants/2479761

Is all of what I'm doing and have to deal with worth the 9EUR/h salary?