Citizens of one state are given rights when traveling through or doing business in other states in the Priviledges or Immunities clause. States rights to oppress local residents was further limited by the 14th Amendment.
The income tax amendment actually had minor effect.
The Election of Senators acted to diffuse power still more, removing authority to elect senators from the state legislature, and giving it to state voters. If diffuse power is a good thing, this was a good thing.
All unnecessary wordiness aside, you are now on record defending both the 16th and 17th amendments. All of Freeperdom knows what kind of person you "pretend" to be. In reality you are a progressive. IMO You should not be here.
Rather, if you can not defend the US constitution, as passed, and as amended, perhaps you would be happier someplace else.
I note you have no substantive disagreement with my reading of the various amendments.
You may prefer legislative selection of senators, as the common people can’t be trusted to vote for the right person.
You may prefer that large landowners not be taxed for rent they collect, while the people who pay them rent are taxed on their wages.
I think those amendments were reasonable changes in principle. That doesn’t mean I approve of all that happened afterwards. I am also on record for abolishing the Departments of Agriculture, Education, Labor, Housing and Urban Development as a start.