Sorry, no offense meant.
Regarding Windows' accent color border for an active window, I don't really get their intention. Whatever color the user may pick it always won't match many apps. Also auto-pick background color option only makes sense when main window is not maximized. I think either the border itself should be able to be disabled or an app should be able to override the color. Hopefully you find some way to do that, but if not, don't worry too much. I will just accept the way Windows is designed.