Won't hold zero - Swampfox Liberty II 1x24mm Reflex Sight

This is the 2nd Swamp Fox red dot I've owned. Both have been garbage. This one will not hold zero on a 9mm pistol. After less than 10 rounds, you can visibly see the red dot start to walk to the right of the iron sights and shots start to move. I rezeroed 3 times only to see it repeat the issue. The clicks are terrible and each click makes large adjustments. I sent an email to their support to see what their response would be. A couple years ago, I had a Swamp Fox red dot that had to go back as it would not adjust. They sent me a replacement but it later had the same problem. I ended up throwing it away. No more Swamp Fox for me.