Used WP Smush to the fullest extend but still a low score

Hey there,

I am a bit confused as to why, after using WP Smush Pro and bulk smushing everything, that I am still getting a low score on both the hummingbird report and on GT Metrix (link to my report).

It says that I need to serve scaled images on GT Metrix. Is this what Hummingbird is reporting also?

Any help here would be greatly appreciated since it seems that these images are a main issue for the site speed in my particular case.