Well, something I have taken to doing, is enabling zoom using hotkeys in Accessibility preferences.Thanks man I really appreciate your help This is a great idea but the text size in any application remains still the same what is so exhausting to read. I actually found a interesting information about metal but I am not really sure if this is still the case(post is about 3 months old): https://www.reddit.com/r/apple/comments/39io36/metal_supported_gpus_and_no_actual_metal/
Though I have a 1920x1080 display, so I usually only use it when I need to focus on something.
It may not be completely accurate information.
Even if the WindowServer itself isn't making Metal calls, it could be using other system components that are.