You say this as if anti majoritarian is a bug. It's not. It's a feature. The US system is supposed to prevent tyranny of the majority. That's why there are checks and balances in it. That's why the Constitution limits the powers of the branches of government, and why further limits were put in place in the Bill of Rights. The US system is not supposed to be a tool for the majority to enforce its will on everyone. It's supposed to be a tool for protecting everyone's basic rights and limiting government to certain particular functions, not to allow it to do whatever a 51% majority wants. That was the original idea of the founders of the US system.
I would say that, if anything, we have too much majoritarian thinking in the US today, and I would support amending the Constitution to put more roadblocks in the way of a 51% majority being able to simply run roughshod over everybody else.
> all of these rules get set by majority vote
Yes, and this is an example of too much majoritarian thinking; whoever has the majority in either house of Congress takes that as permission to gerrymander the rules however they like to favor their preferences.