You think you are buying a TV but you are actually buying a billboard. With how scarce our attention is in the current era, advertisers are paying a pretty penny to shove an ad in your face via your TV's 'smart' features with the hope of getting a guaranteed conversion. If this strategy becomes even more lucrative I wouldn't be surprised if in the near future you can get a 4K top of the line "TV" for free.

TV shows on the other hand, have suffered extreme shrinkflation.

From 20+ episode seasons every year to maybe 8-10 episodes every 2-3 years.

Yeah, budgets/production values are higher. But characters and storytelling were often better in those old shows (Star Trek TNG/DS9, Lost, 24, Breaking Bad) where they could make those longer seasons every year for 5 or more years in a row. Simply far more screen time for character development.

They don't last as long anymore and are more difficult to repair.

Because TVs can be made to show ads, especially if the manufacturer themselves partners with an ad network.

China

Does your television not take 10 seconds to start, 2 seconds to respond to button inputs, request internet access, try to sell you things, and exfiltrate your personal data? If not: where are you getting your televisions?