> Blaming the user is sometimes what it boils down to.

At least we agree about your argument. :)

> Signal at minimum will ensure no one is snooping on your messages, and it's up to the user whether they want to take that further.

Signal also secures metadata, including the participants in the conversation. That is undeniable - they have gone through considerable development investment to provide that feature.

> that user's ISP has performed terribly

Now we're blaming the ISP. If your app doesn't work with your users and ISPs, who does it work for? And how does a non-technical end-user know whether or when to trust you?