As he said in his _Memoirs_, this aversion hid from him the true worth of _Don Juan_ and _Le Nozze di Figaro_.

One wonders whether he knew that his idol, Gluck, wrote music for Italian texts not only in the case of his first works but also in _Orphee_ and _Alceste_.

And whether he knew that the aria _"O malheureuse Iphigenie"_ was an Italian song badly translated into French.

Perhaps he was ignorant of all this in his youth for Berlioz was a genius, not a scholar.
The word genius tells the whole story.

Berlioz wrote badly.