>>Then, to get specifically to the oppressive aspects of the US, they range from slavery and lack of women's rights from its foundation, to segregation that existed in law up to the middle of the 20th Century (and arguably still exists in fact to some extent and in some places in the US even now), to the imprisonment in concentration camps of Americans of Japanese descent, to discrimination against people who weren't heterosexual, to the War on Drugs and police brutality which primarily impact minorities, to abuse, killing, and imprisonment of people who come to the US from other countries.
To the imprisonment of those who refuse to surrender their privacy and submit an income tax return, and pay the income tax, to the prohibition of mutually voluntary economic interactions, like getting a haircut from an unlicensed barber, where barbers are licensed.
The important thing to remember is that oppression in a democracy is not perceived as oppression to the majority, so democracy will generally be perceived as non-oppressive, due to the subjectivity of what constitutes it.
To the imprisonment of those who refuse to surrender their privacy and submit an income tax return, and pay the income tax, to the prohibition of mutually voluntary economic interactions, like getting a haircut from an unlicensed barber, where barbers are licensed.
The important thing to remember is that oppression in a democracy is not perceived as oppression to the majority, so democracy will generally be perceived as non-oppressive, due to the subjectivity of what constitutes it.