I blame this squarely on the congress. Congress has been the weakest it’s ever been, passing almost nothing substantial. If we had to rely on them to ensure basic things like drug approvals we never have anything. They can barely get funding passed to fund themselves!
Perhaps because Democrats control half of Congress today, and the general trend of Congressional avoidance-of-clear-rulemaking has been the same even during those periods that Dems or Republicans control both chambers.
The filibuster makes this kind of 'control' moot. You need a filibuster proof majority in the Senate and a majority in the House to actually get anything done (and the Presidency, to not veto). 'Control of half of Congress' when that half is the house, is meaningless.
That applies equally when each party is the filibuster-sized minority in the Senate.
And: if Senate majorities really want to pass something, they can change the filibuster rules – and have, for some topics.
Otherwise, the filibuster is maintained out of tradition, courtesy, and its usefulness as a change-of-control 'debounce' mechanism – as well as providing a convenient excuse for posturing more and doing less, as Congress is wont.
Still, in other eras, Congress was able to move compromise legislation forward. Recently, Congress has been unable to – both parties, no matter the relative control. Any belief that it's only "the other guys" is partisan myside blindness.
