Me trying to slowly move to Non-Chinese products. It’s quite easy for me as most things in my house are already non-Chinese. Some might be made in China though.
I can't say for sure but Asus phones are notorious when it comes to battery degradation. I still have Asus Zenfone 2laser ze550kl brought in 2015 and the battery started bulging withing 1-2 years. Asus care told me to come to Delhi's Nehru place(I was in Delhi at that time) to get it replaced. I got the same battery from ebay while the website existed. Or ask Asus care if they have spare batteries.