There were numerous pieces on The Guardian, Intercept, NYT and Vox decrying Obama's mass surveillance as a huge blot on his administration and his biggest stain alongside illegal drone strikes.
It was literally one of the biggest reasons people aside from Republicans disliked his tenure.
There were a ton of protests against mass surveillance around the time of the whole Snowden fiasco, and even the Oscars recognized Citizenfour, which critisised Obama for massively expanding mass surveillance.