The Mac makes me feel old

I am still liking the new Mac, but clearly it is made for young people. It's starting to annoy me that every time I open an application, the first thing I have to do is figure out how to INCREASE THE TYPE SIZE so my farsighted eyes can work without strain. Why is Apple so fond of tiny, tiny type?

In some applications this setting is easy to find and to change by default. Other applications bury it in obscure places, or offer no discernable way to change the default (I'm looking at you, Firefox). I have to adjust the text size Every. Single. Time., a constant reminder of the aged and decrepit state of my eyesight. My business partner Zena is a Mac gal, and I never understood why her Word and Excel documents would come to me with the Zoom set at 150% or 200%. That setting showed about 6 words' worth of text on my old PC screen, but turns out it's the bare minimum setting on the Mac.