The latest kindles offer a terrible user experience compared to the original - the device has just become yet another way to force ads and shopping portals into

The latest kindles offer a terrible user experience compared to the original - the device has just become yet another way to force ads and shopping portals into people's faces. Are there any e-readers which do offer a simple, minimalist interface? I've given up hope of finding a low-distraction alternative to an Android tablet for reading PDFs, but have never had the opportunity to try any e-ink devices other than Kindles and Remarkables (which are too expensive and seem like imminent abandonware given the backlash against their subscription model).