Apple India — iphone x logic board issue

Address: Kolkata, West Bengal, 700099

My iphone x 64gb silver died without any warning. And the iphone was so hot that time, i couldn't able to touch hold it. I kept the phone away for 2hr then it's started to cool. Then, i took my phone to apple authorised service centre. Apple service centre said that the phone has hardware issues with the logic board. I can tell you with an outmost confidence my phone has no physical damage also never drowned into water.
For repairing, service centre asking me to pay almost` equal to buy a new iphone.

Pls note my phone out of warranty and not protected by apple care. Purchased date is 17.06.2018.

I can't believe that that apple product can arise issue like that. I also have a chat with apple phone support they told me that decision is final according to rules and regulation.

But i don't understand, is apple make iphone for one year only. I can't believe.