What is the main conflict in Sabbath's Theater by Philip Roth?

In the comical novel Sabbath’s Theater, Mickey Sabbath is a retired erotic puppeteer whose lascivious and shocking life choices have left him on a precipice of self- destruction when the death of his long-time wanton mistress Drenka tips him over the edge. Like a puppet master Sabbath manipulates events and the people around him as he delves into the questions of his past as he pulls his own strings towards the closing curtain of his life’s performance.