On the issue of the senate here I present my opinions nobody asked for: I live in a country with a unicameral parlaiment with both party list and local representatives serving in it and boy it has it's problems too. To be fair they are caused by shitty election laws and I'm fairly certain most of the USA's problems are a result of that too. The two party system is way more harmful than the senate in my opinion and while every state getting two senators sounds stupid I do see it's advantages.
For one it does not guarantee a good system but it does guarantee a stable one. Obviously the people who came up with it thought their system was pretty good so it made sense to make it hard to temper with. Then people figured out the system wasn't as good as they initially thought and turns out you can change stuff if enough people around the country agree.
In my country it's election (for everyone in the parliament) every four years, whoever wins probably gets to rewrite the constitution if they are into that and the other half of the country goes to the streets for like two days before realizing they will just do it back all in four years.
If I had to summarize I think the senate good be a good system. It isn't but it could be.
So yeah I do envy that kind of system even if just a bit (well the fact that more than one person here seems to think things would be better if their system was more like someone else's seems to indicate the system itself may be irrelevant), but this may not be my best take ever, given it's 4 AM when I'm writing this lol
