Harris has since deleted all of his comments, but as he should know by now, screenshots are forever.
"[Taylor] controlled the media and this situation," Harris appeared to argue. "I had no idea what was going on. So that kind of makes it a lot worse from my perspective."
The 32-year-old EDM artist also seemed to imply that, despite rumors to the contrary, it wasn't him who decided to call things off.
"I didn't leave anyone," Harris wrote, according to another screenshot, "and she's def not sad. It's all good."
"Not jealous sir, free," Harris allegedly wrote, later apparently adding, "I cared too much and then I didn't care all. I am a real person remember."
Harris was also asked "why [do you] hate Taylor?" To which he reportedly replied, "I don't at all."
Later in the day, Harris took to Snapchat where he played Jessie J's single "Domino," with the lyrics, "I'm feeling sexy and free." Harris then asked, "Who else is feeling sexy and free? I am!"
ET has reached out to Harris' rep. A source close to the DJ says he did not write the comments.