In @dngray’s defense, I think that thread was ridiculously confusing and people were talking over each other about completely different things constantly. I personally believe @dngray was mainly talking about the one problem described at What should we require of VPN providers on macOS? and his response to that problem was fairly justifiable. However, if you were in that thread wanting to talk about one of the other two problems with Proton then you’d indeed probably read his response as unreasonable.
In defense of the entire team, this remains a volunteer effort and I think people should be more understanding of this, but I also agree people should generally be more careful about speaking on behalf of others, and on behalf of the project as a whole.