It's not just you. I was shooting competitively as a teenager and absolutely loved my Ruger GP100 .357 magnum, but only when I had time to *advertiser censored* / steady / aim before each shot. My accuracy in double-action was terrible, even with proper form.
I don't think accuracy comes into play here though, even shooting with one hand. At a distance of just a few feet... But here's what I don't get:
On one hand I feel the only reason the shooter used a revolver was to not leave brass. Meticulously planned down to that detail? It also seemed to me that the shooter was deliberately waiting for her husband to leave. He/she was in the area earlier, but didn't move in until the husband had left. More planning. And on a day with an impromptu garage sale that not a lot of people knew about - was he/she surveilling diligently enough to know this and use it as an opportunity?
On the other hand, four shots doesn't seem very well planned at all. And circling back to drive by slowly after the shooting? The possible exit routes are just crazy. While so much seems planned to avoid detection, there are just too many holes to say it was well planned. But here we are, nearly four years later, trying to figure it out and we don't even know if the shooter is male or female. How is that even possible?