With all due respect to Trump, term limits are not the problem imo.
More specifically, if Trump were to work with patriots and state lawmakers to politically force the corrupt Washington cartel to surrender 10th Amendment-protected state powers and uniquely associated state revenues that the cartel been stealing from the states for decades back to the states, then the states would probably have trouble finding citizens that would be willing to serve as federal lawmakers.
In other words, crooks long ago wised up to the idea that getting themselves elected as federal lawmakers to make laws to steal peoples’ money in the form of unconstitutional federal taxes is much easier than robbing banks for a living.
“Congress is not empowered to tax for those purposes which are within the exclusive province of the States.” —Justice John Marshall, Gibbons v. Ogden, 1824.
Well that proves just how effective the Constitution is in restraining tyranny.