I'm certainly not saying "blame the consumer", but if people really don't like ads so much (to the extent that they stop clicking on them), really dislike the subpar streaming services so much (to the extent that they unsubscribe) — then why haven't they abandoned these products?
There are other countries where valuing quality seems to be more deeply embedded in the culture, and most people in these countries will reject subpar offerings altogether. I think the U.S. has had a uniquely precipitous fall in this regard — the average person just doesn't seem to care that much. Why this is the case, I'm not sure, but it's not surprising that since Silicon Valley is located in the U.S., the region simply optimizes on whatever (revealed) consumer preferences return the most. Tech companies are certainly not unique in this regard.