There's some points I agree with, though there's some that are obviously flawed, such as SSJ Vegetto > SS4 Goku. The Xenoverse part is alright, since whilst video games are a poor source in most cases, this is the only material that's tried to tackle this subject.
The part about the BoG Promotional material is flawed too though, since it only includes canon villains (Nappa/Vegeta, Freeza, Cell and Boo), not GT villains.