Oh no! I'm sorry that you went through that - check out my latest post:
https://www.googlenestcommunity.com/t5/Chromecast/Netflix-won-t-link-to-home/m-p/286060/highlight/true#M29361
I got through to someone at Google and they confirmed they're aware of
the issue and are working on it. They did say to submit a feedback
report via the device:"submit a feedback report using your Nest Hub with
the keywords, "GHT3 Unable to link Netf...
