CONSERVATIVES voted in the term limits because Roosevelt was a LIBERAL.
(And before around 1974, CONSERVATIVES were in the DEMOCRATIC party, e.g., Alabama Gov. George Wallace. They moved to the Republican party when a LIBERAL Democrat--Lyndon Johnson--wound up becoming President.)
Congressional term limits would require a constitutional amendment passed by TWO-THIRDS of the House AND the Republican-controlled Senate.
AND THEN that would have to be RATIFIED by 38 states, most of which are Republican-controlled.
NOT GONNA HAPPEN ...