I do 3K cards at 95% with the box ticked for the clearest image with windows scaling 150% on a 28" 4K monitor.
you just said what your culprit is.
Windows Scaling at 150%.
Your GUI and all of the Animations are Pixel doubled.
Every pixel being displayed is Being doubled in size.
You have to eliminate the Windows Scaling of the iStripper App.
YES, the App will be so tiny you can barley read it.
But that is Because it is NO LONGER being pixel doubled.
once you eliminate the Windows Scaling, then you can enjoy the Animations at their Native resolution.
With the box CHECKED don't zoom over 100%, you will NOT be able to Size the animations bigger than their
native size.
On a 4K screen, these might appear small at their native size.
But that is the MAX non-Scaled sized of the animations.
Remove the check from the Do not scale over 100% and now you can size the animations to your Screen.
They will still be crystal Clear, but not as Clear as they are when not scaled over 100%