Every iPhone, every year - someone will claim that it scratched just after a few days “by itself”, while their previous phones lasted for years without a single scratch.
Every iPhone. Every year. I’m serious, you can check.
The reality is, they scratch the same as before - or less. The glass is only getting better.
There could be a lot of reasons why your brand new phone is scratched after a short use while previous ones were fine: a specific type of dust in your pockets, a totally random set of circumstances, psychological reasons, etc.
Example: one day I noticed a big scratch on my Apple Watch. I was careful with it, I don’t remember hitting it or anything, and I’ve been the only person using it. And yet, I am convinced that it was me who scratched it, and that I just didn’t notice that moment that was totally my fault. Or maybe it just, you know, happened. Like, maybe my shirt sleeve had something that scratched it in a way that happens once in a thousand cases. Who knows? But it’s the first Apple screen I’ve scratched like that, even though I had a lot of Apple devices before. It must mean the Watch screen is weaker, right? Um, no. It’s just bad luck or carelessness.
This is not being defensive. It’s how things are.