Alex, you are getting yourself in new trouble, and you are not out of woods from the old one (and I am not mentioning lady troubles
here)
Dark matter on this "drawing" WAS detected by its gravitational influence on light (bending space-time continuum or gravity pull, whatever you like more) coming from background objects. The fact that it was not "seen" or detected by some other, more "conventional" method (and what is wrong with this one?), means nothing. IT IS THERE.
Period.