This is always going a judgement call, but I think we've tilted slightly too far in the anti-majoritarian direction.
We all understand that the design of any government involves making a tradeoff between majority rule and minority rights. Nobody wants to live under a government where 50.01% of the electorate gets to dictate every facet of life to the other 49.99%. But on the other hand, the government needs to be able to govern, so there needs to be a viable way for legislative majorities to enact laws.
In our system, we have a whole bunch of features that make life hard for majorities. First, we have a BOR that takes entire topics off the table for democratic deliberation -- no majority can ever declare Christianity to be the state religion, for example. More mundanely, it's not enough to have a simple legislative majority. You need a majority in two different chambers, which are elected differently and which operate differently. And the president can veto stuff that he doesn't like. And courts can strike laws down if they run afoul of some provision or another. Life is already pretty challenging for majorities, and they're already operating with one hand tied behind their back.
That's all fine IMO.
The filibuster goes too far because it effectively turns the senate into an institution that simply can't do anything. Consider the Build Back Better Act. I get that this might not be the type of legislation that you or I would support, but it wasn't especially radical. It seemed like the kind of thing that a Democratic president with a Democratic house and Democratic senate should have been able to pass. When a party controls the presidency and both chambers of congress and still can't get ordinary legislation across the finish line because on chamber decided that it won't do anything without a 60% majority, this seems like bad government design.