Here's a well-written criticism:
https://www.thenation.com/article/dianne-feinstein-isnt-too-old-but-she-is-too-out-of-touch
I'm wholly dissatisfied with the corporatist Democratic machine; these two spiders control large sticky webs. And Big Money Democratic politico Steny Hoyer is even worse. The corruption of US politics in both major parties runs very deep. To progress we must confront these rigid oldsters: "Thank You for your service. Now git!"