I agree with this take.
We are wired to find the next problem and to solve it. Enjoy our work for a short while and then start looking for the next problem to solve.
Whether it is cultural or genetic, I don't know, but it's definitely very deep in our western psyche and it will not be going away any time soon.
The main problem I see is that a lot of people in Western society nowadays use complaining as a substitute for action, and so problems don't get solved, but people convince themselves that they took action by complaining.
The Dems should call his bluff and propose a constitutional amendment allowing three terms, perhaps under the condition that sitting presidents must win an open primary to be eligible for a second or third nomination.
FDR had three terms, plus a few months of a fourth term.
IMHO, the bigger issue is not having three terms, but the fact that sitting presidents can get the nomination without winning a primary. This practice removes an important opportunity to replace them.