It isn't hard to understand. We understand perfectly well that you don't like reality. But reality doesn't care if you like it or not. No amount of wishing for that to be a contradiction will actually make it a contradiction.
No, he's 10 years old(er) and very much alive. Only the clock he took with him accurately shows his biological age.
There is nothing to refute. Both measurements of time's passage are valid - for the different twins they are measuring for.
We'll keep going around and around like this. You won't ever even pretend to understand what is being said. Here, I'll do the next few rounds for you just to save some time:
Chinglu: So you're saying the astronomical observation must be wrong?
Us: No, all 3 time measurements are valid (correct).
Chinglu: So you're saying one of the 3 clocks must be wrong?
Us: No, all 3 time measurements are valid (correct).
Chinglu: So which one is wrong?
Us: No, all 3 time measurements are valid (correct).
Chinglu: The spaceship's clock must be wrong then, right?
Us: No, all 3 time measurements are valid (correct).
Chinglu: Then which one is wrong?
Us: No, all 3 time measurements are valid (correct).
Chinglu: But if they don't agree, one must be wrong, right?
Us: No, all 3 time measurements are valid (correct).
Repeat.
Except....
Ooh, we're so close. That almost implies you actually understand that the traveling twin can watch the earth go around the sun 1000 times and still only age himself 10 years. The proof is, of course, not of that exact situation, but there is a mountain of evidences showing that to be true. If I become convinced that you accept that's what Relativity predicts and stop with the mindless loop you're in, I may even try to discuss that evidence with you!
You are stuck on the same confusion.
Both twins lived the same astronomical age of 12 earth orbits.
Yet, one clock of the traveling twin claims that twin only loved 10 years.
So, the traveling twin claims he lived 12 earth orbits and 10 earth orbits which is a contradiction.
So, all humans should get a watch that wrongly runs slower than the actual earth orbits. Then, they will not age as quickly as those that posses a correct watch.
What kind of crackpottery is this?
What if a person got a watch that stopped running.
Then, they would live forever?