The A2's spec says its double precision performance is 140 GFLOPS vs the V100's 7 TFLOPS, so this is pretty much expected. Even its single precision performance is significantly worse. It also has a weak memory bandwidth.
I guess the lesson is that NVIDIA wants to give you a range of performance vs price trade-offs even with the latest architectures. I'm guessing the A2 is coming in at about 1/10th the price of the V100, or thereabouts?
I'll admit I'm less certain why it performs worse than the 1050. Obviously there are a lot of different factors involved, but you might want to contact NVIDIA. As a data center GPU it does have certain power and cooling requirements that could affect its performance if not done right.
