You’re using a laptop, right? To conserve battery useage, the integrated graphics chip on the MO is used unless you override that default setting to direct the computer to use the graphics card. The greyed out hardware acceleration option you saw indicates that hardware acceleration was not available to you for SU (the AMD card was not being used.)
One of the more sensible suggestions from MS was to right-click on the shortcut to run SU as administrator.
Sketch3d_de is a SU reseller who often deals with professionals with demanding software performance requirements on a budget. Once upon a time, SU only had the Pro version and catered to professional with computers that usually exceeded the hardware/system requirements - and that was back when files were commonly only 10 MB and a monster file was 40 MB. To improve SU performance, the developers rely more heavily on the graphics driver OpenGL functions as that specialize graphics RAM can be up to 3000x faster than other system resources. The graphics driver is now even involved in saving files. Some people now are somehow working with files as large as 600 MB. There’s an interesting balancing game dealing with the pro crowd and the free crowd. Yet millions of people use SU quite successfully.