Umm... They are.
That's why there are elections. If voters don't like an incumbent, they are free to vote the bum out.
Why do you want to take away the right of voters to choose who represents them?
That’s not a term limit, and I think you know it. Voters have no right to choose who represents them. There is merely a system whereby we allow them to vote according to various limitations. For instance, they can’t suddenly choose to vote a Congressman out in the middle of his term, no matter how many voters agree. They can’t elect a president to a third term. This is so because we were stuck with FDR as president for life because voters are stupid.
I do not recognize what you term as a "right."
The Framers did very well with our Constitution, but dropped the ball when it came to rotation in office. Previous Framers got it right in the Articles of Confederation. The annually appointed reps to Congress were limited to three years out of any term of six years. They were also subject to recall by their states.
Rotation in office would largely preclude career politicians and discourage the rise of demagogues. Returning to the real world to make an honest living on a regular basis would do wonders for our once republic.
Here. Here. Agreed.