Other than Guardians, Phase II was Avengers and sequels to Phase One. Its stupid to argue against the strategy of doing sequels to hit movies especially when those sequels all did mega amounts of money at the box office.
And as to Guardians, I'd also like to point out how stupid some of diversity champions are being. You have three main non CGI characters are two of them are minorities (of different races no less). You have two CGI characters and one of them is voiced by a minority. What does it take to make the diversity people happy? Having one white guy main character and a white guy doing a CGI voice is too much white for you or something? Now sure I'll agree that one more female, Phylla maybe, would have been good to help balance out the gender issue but on the racial front you don't get more diverse than what they did.