First of all, you have no right calling people mechalel shabbos when you have no idea what you are talking about.
Not only is the eruv kosher but it is inspected every week. If you would like more information I would be happy to provide the contact information for my Rabbi who deals with the eruv every week.
Lets stop this “holier than thou” attitude – you aren’t. If you don’t hold by the eruv – then don’t, but stop condemning others who have valid sources on which to rely.