AppleTV does not update from TvOS 15.5

I finally fixed it.

The solution proposed did not work, Reset and Install, I already tried unsuccessfully. I did not contact Apple Support, as the AppleTV is 5 years old and long out of warranty.

What worked was:

1) open system settings

2) go to System->Reset

3) If reset+install does not work do a full reset.

Going directly to Reset, will skip the unsuccessful attempt to install any system updates that also stops the reset process, and only when the system has been reset properly, the installation will work again.

Not really helpful, as I stated, I already tried to manually update (going to system->install update, both normal (to 16.3.2 and to Beta 16.4.x), reset and install from scratch (what the instructions from support.apple.com call Reset and update), but that fails after deleting all apps, by telling me that it cannot update this moment, so please try later.

Extremely bad design, that there is only calling Apple, which most likely is not for free, as it is far out of warranty.

I also got to that state without additional help, sorry to say.

I ended up buying a new one instead of the hassle.

It may be well meant, but you are not really helping just by re-iterating the stuff from the normal support pages.

If you have nothing to add, why waste the space and time and look for issues, that demand more than just copying and pasting half-baked solutions found in the support pages anyway that probably doesn't even help.

You actually discredit your own rating this way, as it shows how little extra you know, in spite of having "Community Specialist" with your name.

I was hoping for real solutions from real people, not just copying pasting from the known support pages.