That video is not reflective of the gun but rather this gentleman's lack of pistol skills.
At 21 feet/7 yards that pistol will make one ragged hole with bulk pack 230 FMJ. At 40 yards that pistol should be keeping the shots under 6 inches off hand and if shooter rested (a range bag on a table) then under 3 inches but that's for a shooter with some level of skill. The Mark 23 from a machine rest will cut around a 1-2 inch hole and ammo quality plays a bit more of a role at 40 yards.
The amazing thing is it does it while maintaining a combat level of reliability. The issue as mentioned is it's a big dang hog of a pistol.
I agree. That weapon is more accurate than the guy who was shooting it.