On my own end, as another of the people you pmed to ask if I was interested, I did not mind the pm itself. I can appreciate an attempt to generate traffic and find people who might join. I will say that it took me several moments of suspicion before I decided to treat it as not spam though, given as this site has had some history of random links not always leading where you think they will. So, that's my reason for initially just deleting the pm without replying. When I saw your name in the Recent Checks list and clicked the link there, I thought it was an interesting premise but not wholly my cup of tea, similar to what others have said, and didn't have the time to join another rp either way. 

So, I don't think you did anything wrong in that regard. You took the initiative. As others are saying though, and as your pie chart shows, it isn't always the most efficient route.

As far as this pie chart itself being potentially offensive, I have to admit that when I first clicked the link and realised what it was referencing and who had posted it, I did find it a bit insulting and confrontational. Having read through the thread and your own intentions, however, I now realise the meme itself is not the problem. It's just a pie chart stating facts. We've all dealt with the issue of having a story we want to write and having to find people to write it with amongst the numerous strangers on this site with so many varied interests. The bigger problem is the way you've titled this thread, which very much does imply a negative connotation to the meme itself, and as BrokenPromise previously mentioned, with it being in a public forum for us people you pmed to see, I'm not surprised it received the response that it did. 

Your frustrations are fair. Your pie chart is spouting facts. But with the only other context being how you hate these kinds of people.... I hope you can see how that might fall flat to, well, those people.

On a brighter note though, it is good to hear that you've been able to find people to write with, and I hope you continue to have great success. :)