Yes, Rodgers' daughter Mary has some opinions on her father's trajectory of achievements.
She points out that he was an alcoholic, a heavy drinker.
Ironically, the word she uses for what happened to his talent over the years is
"dried up."
First with Hart, when Rodgers was young.
Then Rodgers' mature years with Hammerstein.
Then Hammerstein dies,
and Rodgers' music seems to slowly die inside of him.
Tragic, when you think about it.