It's unfair to say the unique Russian wide angle, or any Russian lens for that matter, is flawed. This formulation is the basis for the pure symmetrical wide angles such as the Biogon and Super Angulon. The Russar is a symmetrical 6 element lens and when the potential issues of decentering and collimation are taken care of, this lens is just as good at f/8 as anything by Leica, Schneider, Zeiss and especially Cosina. The formulation of the 21mm CV lens is a whole different animal. Not a symmetrical lens by any means and while this can make for a faster optic, with less vignetting, asymmetrical formulations have more field curvature as well as distortion.
This Lomography lens is certainly overpriced but the Russar 20 is a very good lens itself and decrying it as junk is just some exclusivity that is simply paid for but without the guarantee of any more image quality when the paper is exposed, fixed then shown to an audience.
I love getting 99% of the image quality of a new Leica 50mm Summicron V5 with just a $12 Helios-103. I'm not too proud at all and in this comparison the images are so close that it's hard to know which lens took which image sometimes.
Phil Forrest