Few box manufacturers promote their products with photographs of bats actually using their boxes. Fortunately with the invention of the internet, it is now possible to compare proven products with those that are more intended for decoration.
Bad designs are simply flawed from the start.
They are often too small overall and contain crevices too large. Sometimes a critical detail is omitted, such as a landing plate. Usually these boxes cannot compete with a modern design, even after being upgraded by a creative hobbiest. Bad construction is a different matter, usually the box can be successfull after some paint, caulk, extra screws, and extra roughening. A single chamber box.