The stroke size is highly customizable. What do you mean "the friction between the pen and stylus is bad"? As others have pointed out, you can get screen protectors and nibs for Apple pencils.

The problem is that the screen surface and the pen are fairly far apart, so the stroke appears "floating". This makes it harder to do fine drawing.

Try to "dot i-s" in a long word and see for yourself. It's just awkward. So people compensate by using thicker strokes that hide that "floating" effect.

I'm studying Chinese, and writing the characters is pretty much the only way to learn them. So far, the only device that semi-worked for me was a reMarkable 2 tablet. But its software is too shitty to be useful.

So I just switched to paper completely.