Hey mobile devs, what is your stance towards these font and display size system settings ?

Like i tried putting those settings to max and most of my app's ui is broken beyond repair. Even small margins like 16dp takes more space than the width of my usb cable wire.
I personally like keep my fonts and screen sizes to min. Thus my apps look sweet on my phone, a little meh on average phones with default settings , and downright unusable if i put the settings to max.

So these days i test them for even the largest of settings and often end up with hacks for max settings or compromising the design for min settings.

So how do you keep a balance?