I have slight astigmatism too and quality makes a difference. What is a small dot wit a little bit of starburst in my Venom, 503, TRS25, Romeo 5 And Romeo 4 dual reticle is a very slight comet on my Aimpoint Micros and MRO’s. Green dots don’t work at all for me.
I prefer LPVO like my Trijicon TR24G’s and TR-25 mildot and green triangle post, and my Steiner PX4.
It’s great to have a true 1x LPVO to use like a red dot and still be able to go 4x or 6x or more. No batteries too in the accupoints