Everybody hates the cable company... Trust me.. It doesn't really matter who they are for the most part.
My favorite company I love to hate is Frontier who just purchased all the Verizon FIOS infrastructure and subscribers in my area (including me).
Verizon was bad, but these new folks take the cake. Frontier wasn't even able to muster enough folks to answer the phones and say they couldn't help you, much less actually know what they where talking about or get a service guy out to fix their recently acquired assets. IT took over a MONTH of trying before anybody could even understand that my internet connection was down and it was THEIR equipment at fault (I knew in about 10 min that they had something messed up on their end..)
So the world hates Comcast more? My guess is that Comcast isn't all that much worse than any of the other providers, they just have a larger install base and more subscribers which hate the cable company. That means that more folks hate them, but only because they have more customers to tick off.