That shit is discouraging and the annoying thing--coming from some who first wrote a Tetris clone a decade ago--is that it's recent. A decade ago you just downloaded a library and put it in the folder you were writing in. Now while that still probably works library how-tos have all either gotten complicated or assume you've already complicated that shit.
And you run software by downloading a .zip, unpacking it and executing the program in that folder.
I miss the times when both development and use was that simple. And it was what, like 10 years ago?
I was more trying to make a point that if you're writing a guide or tutorial, actually start from the beginning.
Part of learning to learn is learning to keep going through things even when you don't fully understand.
It's ok that you don't know what docker is.
It's ok that you don't know what a shell is.
What exactly is the nature of the dismissive attitude from others that has held you back from learning? Perhaps these are real opinions, but consider the source. If they are smarter than they are rude, and their opinions hold value, maybe suck it up and learn something. If it's not worth it to you, ignore them and walk away. Regardless, don't let other people's feelings hold you back from learning. And don't let other people's feelings about you dictate your feelings about yourself.
On the other hand, perhaps these attitudes are partly a projection of your own feelings. Use it as motivation to learn the things that you feel like you should know.