I'm sure you have heard of a lattice fence? Strips of wood in a crisscrossing pattern? That lattice pattern describes how the particles are stacked together. It is a tightly packed uniform formation. It is perfect for use in gas tanks because it is incredibly airtight.
So sort of a mesh like structure but on a very extreme tiny level. Is this right?
You did note this post:
Cathode Ray Tube worked in TV sets for almost a century before it was replaced by current thin screens.
Some of tubes actally worked for decades, especially if TV was watched just a few hours a day.
Vacuum in CRT is mandatory. The electron beam that draws picture on screen (front surface of CRT) must go freely inside.
For decades no gasses were entering such Tubes, keeping internal vacuum preserved.
So, glass is good barrier against atmosphere.
Whatever you say, as "SpJunk" noted, glass is certainly so near to impervious that hardly matters.
Metals (all solid ones that I know of) also are quite impervious, certainly enough to make "vacuum" and pressure chambers.
All your claims of weight being due to the atmosphere "penetrating" metals simply cannot be substantiated.
Especially as the density of the atmosphere is so small. A cubic metre of has a mass of only 1.225 kg, so what difference could absorbing a bit of air make anyway?
Then, as you yourself stated (when talking about water in the upside down glass) , air pressure "pushes" equally in all directions, so how can it provide a
downward force?
From all I have seen in this and other threads, denpressure explains nothing. The more it is explained the more convoluted it gets.
Whatever you claim, the kinetic theory of gases explains the behaviour of gases much more consistently than your ideas.
So why throw away an explanation of gas behaviour the does work for one that clearly does not?