They also knew what they were doing when they created a system of check and balances and a congress made of directly elected congressmen, and a Senate appointed by the state. The 17th amendment ignores both in a blatant power grab.
It was changed for good reason because it was working badly. Massive corruption and drawn out battles that left seats empty. And it would be much worse today. Politicians are scum, I’ll make my own choice of Senator thank you very much.
Magic time warp to an idealized version of the past is not the answer to America’s problems.