Bhakti makes way for putting the leader above the people. It turns representatives into rulers. It is against the basic principle of democracy where people are primary and eternal. Leaders come and go and though you may love a particular leader, you must never be devoted to them.
Love towards your nation does not blind you. It causes you to care about the nation. And caring means being able to spot problems and illnesses and to look for solutions. Or at least state that solutions are needed.