While it's possible you just need cosmetics for sensitive skin here are some things you can keep in mind.
You don't need to use force when shaving. It can just from its weight. I found myself subconsciously using force from my time with a 5 blade Razer.
I also clean the Razer after each use. I remove the blade and clean the blade and parts with soapy water. (Mainly because I have OCD over things being clean, but it definitely helps with pimples cause from old skin oils being on the blade and Razer guard).
Yes but the phone physically cannot be smaller than the screen.
So if the screen itself is too large to be comfortable, it is physically impossible to make it comfortable to use without making the screen smaller.
I measured the radius my thumb can reach, I know exactly the limits of my reach, and thus exactly the largest screen I can use without causing discomfort in my wrist.
The point I am trying to make is that the ideal phone size is personal to the individual. There is no one size fits all. Screen to body ratio cannot change that.
This is why, despite the screen to body ratio improving, a subset of people still ask for smaller phones.
I always try to argue this when people say they'd rather drive to commute.
When you drive both you and your employer lose time. When you take a train you keep your time in a way.