I don't think it's so much about being ungrateful but that Apple decided to push this album to everyone, rather than make it available for download if one wants.
The Apple-U2 deal is between them, the users have nothing to do with it, so why should users be forced to have the album on their devices?
This issue isn't about U2 or the album, it's about forcing things upon users.
Think of cellphones a decade ago, bloated with carrier software which you couldn't remove. Apple was the one who did away with that, and made a 'one OS for all' with the ability to install apps you wanted. But now they're doing exactly what they set out to defeat.