It's the same thing with all companies, businesses, and political parties. No one can make everyone happy. Even the most likeable of people have their haters. Until a clearly "perfect" product appears on the market, everyone will hate everything. That's simply how things work.
Your particular example is basically people not understanding that backwards compatibility would require the PS4 to have the PS4 engine AS WELL AS the PS3 engine to run whatever games. This would make an already expensive console even more expensive.
Next time you are at work, ask yourself if you've done a "reasonable job", a "bad job", or "as perfect a job as you're capable of". If you didn't do the ladder, why not?







