Frustration with Red Dot

I’ll admit up front that I’m not the best handgun shooter, I’m confident with rifles but not pistols.

A while back I had a handgun with an optic. I hated it and traded it in. Well I ended up picking up another today to try. It came with it so I figured what the heck, worst case I can revert to irons.

Took it to the range today and shot a couple hundred rounds. I was horrible with the red dot. Impacts low even after adjustment. It’s not the best quality red dot (crimson trace included with my echelon) but I don’t think it’s the equipment here

When I just looked through the irons I was ok. Fist sized group and 10yds. Switch back to using the dot and I was dog shit

Maybe I’m old or just that shitty of a shot. Anyone have this experience being better on irons than optic? Maybe the irons are hiding something but I’m able to be accurate with it lol