Fake News. Germany launched about 15,000 V1 and V2s and the total loss of life was less than 7,500 - meaning you had to launch two V weapons to kill one Brit. Terrible waste of resources.
I think you are right. They were terror weapons that were by definition terrifying, but they had absolutely zero impact on the course of the war.
The only concrete result of the V1/V2 rocket program was to give an opportunity for skills-development to a great rocket scientist who ended up in the hands of the US and who was a large factor in us putting Americans on the moon.
The environmental cost meanwhile, enormous. Poking holes in the ozone....and THAT is what really gave Hitler a bad name. Truly the first MODERN eco terrorist. Shame on him...