I’ve seen literally all the comics they post before, they’re all stolen from various sources. This is gonna be long because there’s a lot.
http://www.beutifulmagazine.com/ is the earliest source I can find for this and their site comes up multiple times when you reverse image search it:
This post is stolen from Tumblr user @gonnalivethedream. The images all have her watermark in the corner and is another unsourced, image set.
The “Raised Manholes” post, as well as being gross is a direct lift from Reddit, but I can’t find the Original poster’s username at this time.
There’s a few really gross posts that are lifted from /r/creepypms, including a screenshots of conversations where bisexual women are being harrassed.
An artist called Saint Hoax has had multiple images of theirs taken and left uncredited. The campaign was targetting domestic abuse and was called Happily Never After, but their site is currently down for maintenance. (sainthoax.com)
And that’s with 5 minutes of reverse image searching.