Grade school. The Senate differed from the House in 3 ways, (the third being term length) and they carp about the least important of the 3. The people of the states are "the states" anyway and most of us don't want damn middleman making our choices for us. Not that it matters because repeal is not even within 10000 miles of the room the table is in, let alone on it.
Why fixate on silly fantasies? You can't go back in time to a time that never really existed, the Senate was a mess, WHICH IS WHY they made the change. There is no magic procedural fix that will improve our government, only the election of conservatives at the polls can do that.
The Senate was not a mess as it is today. And the States had a lot of power whereas today they have none.
The local state legislator is a neighbor who can’t run and hide. The US Senator can hide and send you weasel words. You have ZERO power over a US Senator unless you’re a one percenter.
As for people repealing the 17th, they will do so when they are offered to trade a vote to elect for a vote to recall; a power to fire rather than hire. Recall empowers, places people on the preferred board, rather than as common shareholders. Recall is much, much more powerful.