Does "the Generous" in "the Generous Quran" mean that the Quran is the most generous thing, and how does this reconcile with Allah being the Most Generous of the generous, and the Quran being one of His attributes?

"Al-Kareem" (The Generous/Noble) is an attribute of the Qur'an. However, mere definition with "al" (the definite article) does not necessarily imply superiority. The Qur'an was not described with superiority as Allah was described with "Al-Akram" (The Most Generous/Noble). So, "Al-Akram" might mean "Al-Kareem." The Qur'an is the speech of Allah, and His speech is one of His attributes. Allah, with His attributes, is Al-A'azz Al-Akram (The Most Mighty, The Most Generous/Noble), so there is no harm in describing the Qur'an as "Al-Akram." The multiplicity of the Qur'an's names indicates its honor and virtue.