Not sure if you personally read them, but customer service unresponsiveness is a common theme in those 1-2 star reviews.

Have you done anything to address this problem? DoorBot was your first gen product; you HAD to expect problems and made sure people were being responded to.

Edit: forgot a word.

Ring has been a little better, but still get a black screen far more often than I'd like, and 3-5s latency on audio for a local wifi device is rather frustrating.