Yeah, that part of the “problem of the Senate” is baked in with its very existence. That was what was wanted – a represenation NOT proportional to population, feature not bug. Sure, the founders may have never contemplated that the biggest state would be 67 times the smallest one, but they would have said, well, that’s what the House is for.
That at some point a large segment of the population thus represented may be filled with nothing but spite and scorn for the other to the point of preferring everyone to suffer rather than “them” to benefit, well, I have to believe they probably could imagine that quite well.
With the House, the freezing of the number creates a phenomenon where the differential weight of some voters will be greater than that of others, since there’s really only 385 out of the 435 seats to play with. Which when you add in the case of the larger states the fact that you may then gerrymander, and you leave it up to partisan bodies to decide how, that helps lock in unrepresentative proportions.
Heck, in the original Congress an amendment was put forth to make a Congressional district represent between 30 and 50 thousand people, which would have given us a 6,000-strong Congress by now (or, rather, would have become the first undone amendment within a couple of decades). A “Wyoming plan” of making each seat be equal to the polulation of the smallest state would probably have to still be tied to a “hard ceiling” just in case some smaller state suffers a mass demographic collapse.
May I remind, though: Today, the Senate is almost 50/50 in partisan representation. There’s nothing about it eventually having 70 senators for 2/3 of the population that is intrinsecally nefarious other than to a certain instinctive sense of “fairness”.
We all are aware that the USA almost universally works on direct-to-person vote for a single official per post in first-past-the-post plurality election, with only a very small handful of places that do runoffs or preferential ballot. Like the WTA system for assigning Electoral Votes that all but two relatively small states use, that is itself perpetuated because it strengthen the political weight of the jurisdiction and makes it easier to get straight majorities without need for coalitions.