The fact that one of those two parties will win does not mean we need to accept the DNC as a valid representative of the working classes, as they fix nothing and maintain imperialism.

They may or may not fix anything, but the RNC will make things worse. The RMC has enabled a fascist takeover that is stripping rights from LGBT people, spreading contagious diseases with antivax policy, abusing and shooting people dead in the street in the name of border security, initiating a coup in Venezuela by kidnapping a national leader, murdering sailors with drone strikes, and denying the basic civil liberties of millions of residents. You can tell me all day about how bad the DNC is but at the end of the day they are the least worst choice.