To answer the OP's question, no, Shapiro isn't. AA is the one who forced this team into "rebuild" mode by going all-in on a ton of aging vets, many of whom turned out to be useless, while depleting the farm system in the process.
The two deep playoff runs were fun after 22 years of total irrelevance, but it was never sustainable and we always got exposed by better-built teams in the end. Unless you're the Yankees, Red Sox, Dodgers, or Cubs, you can't just trade and buy your way to sustainable winning. It starts with the farm system. Always has, always will.