Thousands, really? Let's say you believe all the complaints on this forum (I'm including the exaggerations used to justify a free upgrade), I would bet you'd be hard pressed to find 100 or so unique people. Regardless, how many Eris' hav been sold - a few hundred thousand? At that rate, even a few thousand people with serious problems is only in the 1% category.
As far as being unhappy with their purchase, people can be unhappy for a lot of reasons. People are unhappy that the Eris is discontinued. People where unhappy waiting for the 2.1 rollout. People are unhappy the Eris won't be getting 2.2/3.0. People are unhappy with Sense. People are unhappy better phones have been released. Should someone be held accoutable for all unhappiness?
If you are having a problem with your phone did you ask Verizon to correct it? Have they fixed it or are they trying?