I apologize if my response has offended you, but that does not justify such an angry response.
We are all doing our best effort here. …and you categorized your question under “beginners”, so it should be fair to assume that you have limited experience.
It should also be noted that the LAMMPS software is a community effort. Most code and features are not written by the (core) LAMMPS developers but contributed code. Not all of the contributors have the time (or see the need) to provide detailed examples. All the more so for advanced applications, as that forces people to spend more time thinking about the methodology, study the literature and documentation more carefully.
Being an experience researcher, I know that it is very well possible to teach myself a skill from a publication and a documentation and also that in the most cases this needs to be done in stages for a simplified example while checking the outcome at each stage. While there is some value in having complete examples, they can also be leading people to make assumptions about understanding something that they don’t have understood properly and preventing them from acquiring a skill properly and ultimately leading to tainted results.
Being frustrated about failing to get a working input is part of the game and part of being in research. It is usually an indication that you have not understood something to a sufficient degree. I would even go so far to claim, that this is a defining property of working in research (and many other creative endeavors) that you have to deal with a high degree of frustration. If you don’t understand something that you spend a lot of time on something, but if you finally do, everything is fast and easy until you hit the next barrier and you need to spend a lot of time on that again.