@Ihattaren:
Well. I think that's absolutely only a characteristic of your specific environment and job. IT can be extremely complex these days with continuously growing complexity.
Take a look at the Cloud Native Landscape what amount of different software products are available to consider, learn and use in the Cloud Business:
The amount of money paid is - among other things - dependant on the number of available experts for the needed task. The number of available experts is declining drastically the more complex and difficult a task gets.
Just to further illustrate complexity: A kubernetes fundamentals book for a beginner is for example about 1000 pages long.
I can understand, that you're not happy with your situation and of course, if one has a very simple job, the salary is at a corresponding low level.
Options for you maybe to just look in to current technology development and educate yourself to raise your skills. You may also look more closely at the different areas and tasks of your current job: Where and what can be improved there? Typically there is a lot. There is a vast number of directions and opportunities, especially if you have plenty of time.
For me and myself, I was ever interested in diving more into the different software pieces. I liked to automate and improve things. So I learned things bit by bit on my particular jobs. And everything you learn improves your overall IT-problem-solving capacity.
For example:
So far you were only able to create shell scripts. Now you just have learned some scripting language like python. So with this new skill, you are now capable to solve more complex tasks efficiently, which are not suitable for the shell.
Finally I think high salary may not be an enriching goal. I better recommend to have fun in doing what you do. Some people may disagree. But if you have fun, you like what you do and you willingly dedicate more and more time into your task, which will lead to continuously improving your skills which in consequence automatically raises your salary on the long run.
There's a great motivational video from Steve Jobs about that. (Steve Jobs - On of the Greatest Speeches ever). I do not post the video link, because I'm not sure if it is desirable to post video links here.