Why do steaming services think they have a captive audience and I'm not going to ditch all of them with the crazy influx of annoying ads?

They don't care about you. They don't even want you as a subscriber, you're a pain in the ass. Most people are too tired and not tech savvy enough to pirate. A lot of those will eventually do something else, too, but they can cram ads into the streams faster than those people can find the wherewithal to leave.

In short, this is profitable, and no amount of raging will make it less so. Take care of yourself, but don't pretend you're making line go down.