The stock android it came with had some annoying rough edges compared to a google pixel. This is in terms of the audio levels for apps and notifications, basic user level experience stuff, not advanced nerd stuff.
She moved to a google pixel and was much happier. I installed LineageOS on the ASUS and it's been great with this "upgrade"
I'm hoping they put more effort into refining the OS on this phone.
It used to be that people really wanted stock android, now because google spends so many resources (i.e. UI/UX devs) on The Pixel Experience(tm) stock android has slowly become less user friendly and requires significant changes from the OEM partners to get it to a usable state. And of course those changes are not OSS and don’t contribute back to the original code. Plus it further fractures the whole ecosystem.
I'm sorry but have you used Android 12 on a Pixel 6? It's awful! Even basic things like navigation (gestures or 3-buttons) doesn't work properly!