Didn't Truffaut already do this movie in 1979?
Maybe its just me but the description of this film reminds of The Antione Doinel films by Truffaut. Particularly "Love on the Run"
here is the desription of Truffaut's film:
Antoine Doinel is now more than thirty. He divorces from Christine. He is a proofreader, and is in love with Sabine, a record seller. Colette, his teenager love, is now a lawyer. She buys Antoine's first published autobiographical novel. They meet again in a station...
Here is the description for Russian Dolls:
Xavier is now thirty. No longer a student, he is not yet a well-balanced, fullfiiled adult either. His career is unsatisfying : far from being the renowned novelist he aimed to be he must be content with little jobs such as reporter or ghost writer. His greatest "achievement" in "literature" is his collaboration to the script of a corny TV soap ! His sentimental life is not much better, rhythmed by one night stands and unfinished romances. It looks as if when he seduces a woman beautiful outside and inside such as Kassia or Wendy he can't keep them. Will he ever bring his life into focus?
Does anyone else notice the outright similarity here?