There are 250 million iPhone users, and according to Apple, half have updated. If there were a major problem you would see millions of complaints, not hundreds or thousands. For the most part it is only people with problems who go to Apple forums or other discussion sites. And a few crazy people like gdgmacguy or stevejobsfan123 who put up with endless abuse from people like you in the hope that their experience and expertise will help someone resolve a problem.
And if you did a little research rather than just blathering you would see that posts almost identical to yours have been posted here after every new Apple product, every major and minor iOS update, and randomly in between. Every software release has been called "subpar" by someone. And every product release also. You are not the first. And you won't be the last.
If you then go to Android forums you would see exactly the same thing. Or Nokia forums. Or Blackberry forums. Or the forums for any computer manufacturer. Support forums are for people who need help. Those who don't need help and who have no problems don't generally visit. Which is why you haven't seen 124.999 million posts saying "I have no problems with iOS 6."
People who come here with a problem and describe the problem without being abusive or ranting will usually get advice that will help them.
BTW, there are NO Apple reps chiming in. This is a user to user forum. Apple does not post responses in it, and does not read it.