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Okay, so if you're not a liberal, what leader can you get mad at and look upon their government as a betrayal? Stalin? Raul Castro?
This kind of anti-government rhetoric and world-weary cynicism bleeds away from Marxism into anarchism.
Even from a socialist standpoint, it's possible to be angry at individual bourgeois leaders who fail by capitalist standards. For example, capitalist politicians in India anger people in the CPI(M) and other communist parties not just because they're in favor of exploitation, but because they're corrupt, communalist (especially but not only the BJP), or simply ineffective at industrializing the country compared to China and East Asian capitalist nations.