Answering texts seems to be the only specific function that I must do with my phone and no other device. Otherwise, practically every other device is better to use than a phone.
And if you put those time-wasting apps on a tablet that stays at home instead of your phone, you can't accidentally waste your time when being out and about.
This article is a bit dated (2022), as Apple now has iPhone mirroring if you have a compatible Mac.
Until they make better smartphones, I highly recommend using a PopSocket. I have the magnetic PopSocket which connects to my phone using the MagSafe-compatible ring built-in to the thin TPU case for my Pixel phone. With it, my phone just sits on my fingers with the PopSocket secured between two of my fingers. No hand pain.
And if you put those time-wasting apps on a tablet that stays at home instead of your phone, you can't accidentally waste your time when being out and about.
This article is a bit dated (2022), as Apple now has iPhone mirroring if you have a compatible Mac.