Trump is bad because he is an authoritarian, a fascist, a racist, a rapist, a sexist, an antisemite, a homophobe, a transphobe, and a pathological liar.
It's not because he is a traitor to this country. Fuck, John Brown was considered a traitor. The leaders of the civil rights movement were traitors. Anarchists, socialists and communists in the US are often considered traitors by many.