This black background is impossible to read, doesn't anyone else think so?
Impossible to read ? No, but I agree that, to some, it makes it harder to clearly read or check something on a quick glance.
The new background may look cooler on presentations, screenshots and videos and during use... for a while, but having the option to change it back to white once in a while for some, or definitely in your case (it seems), would be a "tiny" big feature.