Did you actually use it or just rotate it per instructions to see if you have astigmatism?
Generally, no human eye is perfect -- some are just worse to much worse than others.
The goal with any red dot is to focus the eye on the target, not the red dot -- you look through it, not focusing on the dot. Trying to focus on the dot like a front sight will make it blur to some degree for almost anyone since seldom is an eye exactly perfect. It's more a question as to what degree the brain is able correct for those visual imperfections and utilizing your tools properly to minimize those imperfections from becoming evident...
Basically, you can still be combat effective with a red dot despite astigmatism, and even with, you're likely still a faster, more accurate shooter with a red dot than irons.
More so for peep sights than our AK type sights on the VZ, but cowitnessing with irons sometimes also helps the eye to focus which clears up the red dot.
Also, if really bad, and you know you can use standard scopes, a 1-3 to 5 or 9x scope might be a better option.
I have astigmatism in my right eye, shoot right handed and am left eye dominant... I wear glasses when behind a computer working or reading (slight farsightedness [trouble focusing close] in right as well), but don't wear prescription lenses when shooting (in 30s, I'm sure that'll change as I get older) or playing sports. I use my left eye, right hand shooting, (cock head slightly) for pistols, but right eye and right hand for rifles. Red dots, I'm able to shoot both eyes open no problem, right astigmatism eye seeing the red dot. Skeet shooting, I should probably switch to left hand shooting if I did it seriously, and target shooting w/ magnification generally just close the left. And I self taught this way as a kid with BB guns before being properly instructed later than life, but by then the comfort and confidence despite being technically "wrong" has not led to me relearning to shoot as a lefty... Point being, vision problems aren't fun, but they can be overcome.
Had an optometrist describe astigmatism as like a magnifying glass focusing the sun. Perfect is a crisp small dot. Turning slightly to the side skews the image out of round. Moving far away makes it less sharp. These type of not perfect focus issues are essentially astigmatism w/ a red dot -- you lose that crisp round circle. Granted a lot of varying degrees and types of imperfections w/ astigmatism. But glasses and contacts can usually correct.
