Is there any proof of space being created? Is there any proof for space being created?

Because I guess an explanation for the dark energy (dark = our understanding of it) could be that there is a gigantic amount of matter/dark matter that we cannot see (the gray clumps in the picture) that are attracting our matter (the known universe in the middle) => of course the universe is "expanding" with an acceleration. 

Am I talking non-sense?
This is an intriguing proposition, but I would ask how your hypothesis explains that the universe appears to be flat? That is with $\Omega_M + \Omega_\Lambda = 1$. The evidence for this comes from measurements of the cosmic microwave background, yet if we sum up all the matter (including dark matter), we only arrive at $\Omega_M \sim 0.3$.
I do not think that your proposed arrangement both allows an accelerating expansion of the visible part of the universe (which note, can only be gravitationally influenced by &quot;outside regions&quot; that are within causal contact with it) and for it to be geometrically flat.
In addition, I note you are attempting to explain the expansion in some sort of Newtonian sense - I suppose your clumps of far-away dark matter are meant to be &quot;stretching&quot; the observable universe? But that isn't what happens in GR and any Newtonian interpretation would have to counter the problem that if the matter outside the observable universe was uniformly distributed (i.e. in a spherical shell), then it would exert exactly zero force on everything inside it (the shell theorem); but if it were not symmetric then you have to explain why the expansion of the universe appears to be (very close to) isotropic observationally.