Congressional term limits would violate the constitution.
It's already been tried.
That is the opposite of what they expected.
Here is what James Madison had to say about it in federalist papers 53.
"A few of the members, as happens in all such assemblies, will possess superior talents; will, by frequent reelections, become members of long standing; will be thoroughly masters of the public business, and perhaps not unwilling to avail themselves of those advantages. The greater the proportion of new members, and the less the information of the bulk of the members the more apt will they be to fall into the snares that may be laid for them. This remark is no less applicable to the relation which will subsist between the House of Representatives and the Senate."
I can't speak to presidential term limits as it has already happened.