Notes:

iFunny was the earliest source I could find, but it's clearly not the actual source, since other uploads don't have the watermark.
It also showed up on Imgur

Found the image in the first place from a reply to Orteil on Twitter
"i'm so sorry for being that guy but i can't overstate how reminiscent current twitter is of Portal 2 when the entire facility starts to break down because wheatley got so insecure about being called a moron he starts cobbling together abominations that don't work out of spite"