Your rant would be more to the point if it were directed simply at the
guy who screwed up the ride. He's the guy whose inability to see
beyond his own personal expections caused all the problems. Why you
are trying to inveigh against the entire class of riders who can't or
don't care to keep up with your L33t Sp33d is mysterious.
One might be tempted to observe, that since you knew his planning was
likely to be inadequate that you should have taken special precautions
against getting lost.
If you really believe you have never noticed fast riders complaining
about social riders, it's likely your recall is being colored by your
emotional state. There are regularly posts about slow people riding
two+ abreast on MUPs. Iit is beyond debate that these people would fit
within the aegis of "social rider", unless, of course, you wish to mint
a third ring of cycling hell whence to relegate the loi polloi.
..max