US laws and constitutions were created to stop tyranny by making it very difficult to change anything. The result is most laws need a supermajority to pass.

That's probably good at stopping bad laws, but it really stops all laws.

IMO a sideeffect of this is that because courts create law by simple majority, they are often the only body capable of changing anything. As a result, we have politicized courts deciding things that should really just be legislated.

If there was one thing I could change about American law it would be to make it easier to change the law, including constitutional amendments.