I don't see what's untrustworthy, dishonest, or non-transparent about this. I am disappointed they're discontinuing a service I enjoy immensely, but it's their prerogative - they're not required to continue to offer a service if it's not in there interests to do so.
That's like Walmart moving into your small town, pricing its items so low that no local retailer can compete, watching all the local stores shut down, and when only Walmart is left they say "Not enough money to be made here, we're shutting down".
> honest(y) transparency
I think they are being very transparent about it, gave the users plenty of time to migrate to another service, being very clear about their timelines.
> a question of trust
With that I agree with you, though, what is the option? Because if a giant as google is pulling a service out, who should you trust with it? smaller companies? While they might be more interested in keeping the service up, they are more susceptible to other thing that may cut the life of the product short.
What is the other option? Self hosting, that's a whole other discussion, it might be the solution, but it's far from perfect.
> Why should anyone trust Google ever again?
What can you trust 100%? Even google, facebook, twitter might go broke in some years, giants have fallen before, but one might argue that it's still the safe bet.