2007 people were in this poll while there are millions using apple products. It's not enough
Actually, it is. If you look at the statistics of polling, it's rather surprising how small a sample is really needed to make a fair poll. Political polling is done with those sorts of numbers routinely.
That said, I haven't had any particular problem with my iPhone, but as a long-time Apple customer (back to 1979), I'd have to say their overall manufacturing quality is not as good as it used to be. But, as noted as above, all the other PC makers have slacked off on QA as well and make everything as cheaply as possible. In a minute I'm going to start getting nostalgic about the my old Northgate and the indestructible NEC spinwheel printer that used to be attached to it (the one that was eventually replaced by an HP Laserjet that held out for 14 years of fairly heavy use!).