I guarantee you they do give a crap. But there's only so much money available from subscription fees to provide network upgrades, and Comcast spends ~$6-8 billion a year doing so.

I've seen nothing of this low level of service or high cost; I can get a 150mbit connection for $89/mo. It's not Google Fiber, but it's really not bad at all (especially compared to FiOS, which I have and hate with a passion). I mean yeah, their customer service is shit, but the Internet service itself is good.