I’m curious about what the replacement will be, because I have limited experience with video doorbells and have used only two brands. I don’t have a Duo Cam Doorbell but really like my Video Doorbell v2 (which is not battery powered).
Since you tagged your topic with troubleshooting, I wonder if you’re interested in doing that or if you’ve already made the decision to jump ship. I also wonder if the “C0005 error” you mentioned is like the “-3005” error I’ve occasionally seen with other cameras when trying to connect and if that’s something that will be remediated with the latest beta firmware for Duo Cam Doorbell. 
Just based on my own experience with my first Wyze camera, Cam Pan v3, I know that its connectivity has vastly improved over time with firmware updates. Using that camera was incredibly frustrating the first few months I had it, because it would go offline, and there was no way for me to correct that aside from power-cycling it (so I eventually routed power through a smart plug to make remote reboots possible). Based on what I’ve read, it seems like Duo Cam Doorbell had a lot of problems when it was introduced, but I think many of those have been resolved via firmware updates (so I hope yours is updated), and I would expect continued improvements to be delivered in that manner.