No thanks.
Not quite true...
England: monarchy overthrown 1649, replaced by the Puritan republic of Oliver Cromwell (perhaps not a democrat by today's standards, but certainly one by those of the 17th century); restored 1660 to the virtually unanimous joy of the people
France: monarchy overthrown 1792; restored 1814/15 (sadly, the French didn't learn their lesson)
Greece: monarchy overthrown 1924, restored 1935 (only lasted 39 more years, but still an example that disproves your assertion)
Spain: monarchy overthrown 1931 and replaced by a liberal democratic republic; this led to civil war and the monarchy was eventually restored in 1975 thanks to General Franco, and is quite popular today.
Cambodia: monarchy overthrown 1970, restored 1993
Too bad that your "Democratic Republics" that replace monarchies usually turn into horrific tyrannies: France, Russia, Germany, China, Yugoslavia, Bulgaria, Romania, Albania...were those regimes your idea of "tasting freedom and not turning back"?