Having issues after new OSX installs is very frustrating. More so when you see so may having no issues at all. In my case, I hardly notice any difference to Mountain Lion. In performance, speed or stability. Only that I had to upgrade Little Snitch, which I should have done earlier anyway. So finding an 'easy fix' is relevant to each individuals problem. The OP here has issues with connecting online. Others with HDs showing as damaged. Others with certain Apps not working. Very few with all of these. Therefore each user with issues needs to look closely at the posts relevant to their problem and not go on an all out attack on Mavericks as being corrupt or unusable, as that is just a small minority opinion (looks bigger here because it is a Troubleshooting forum, so you won't see much positive!). Also keep in mind that other users here (we are not Apple) are still learning about Mavericks as well, seeing that it has only been out for under a week.
So basically, yes, some users will have some issues, but they are generally fixable and usually relate to Third-Party installs or failing hardware.
Also using someone else's thread for different problem solving can most often end in confusion, and therefore it is recommended to start your own thread, even if you think your problem is similar, because most often it is not.
Cheers and Good Luck
Pete