Apparently just about everyone on Twitter, Facebook, and Reddit has OCD. Having seen a close cousin of mine suffer horribly from OCD (to the point of being house-bound), it's terribly frustrating to see people throw OCD around like its a fashionable accessory.
I totally understand. My sister and a close friend of my wife's both have OCD, and I have also had very mild obsessive tendencies, and it's definitely nothing to joke about. I think it has been over generalized to people who have a high attention to detail, almost "to a fault" - that fault being a supposed debilitating obsession.
A lot of people don't understand that OCD doesn't have the positive effect of producing perfectly crafted things. Instead, severe cases cause panicked, irrational understandings of reality.
(This is for anyone reading, trying to understand why this is offensive.) using "OCD" as a descriptor rather than saying simply that you obsess over details is reducing the awareness of actual OCD and other anxiety related issues.
While "fuck you" is a bit harsh, you've got just as much right as anyone else to criticize their use of certain terms. Apology accepted.
Just FYI, I have been (officially) diagnosed with a minor case of OCD, but it's certainly not to the point of being debilitating or crippling, and I feel for those who do.
Just because someone used a commonly abused expression doesn't mean we need to trash on them. It doesn't really teach anyone anything good.
Beat stupid people with intellectual conversation, not "fuck you"s.