They set themselves a task that they weren't up to, and they failed at it. It doesn't make sense to say "it is remarkable that they made it", because they didn't make it.
A little off topic, but as a reminder of how different the world used to be: families used to move across the US on foot, maybe with a wagon carrying their supplies, and many died doing so. I'm quite thankful I can just get on a plane to see my family :).
Also, as someone who needs to remind themselves occasionally to be less negative, I would encourage you to be less negative about things that aren't 100% a success.
P.S. If you really want to hate on Magellan it would make sense to do so for something like him burning a village in Mactan because they didn't want to convert to Catholicism[0], not this. You may be pleased to hear that this directly led to his death.