It's not bullshit. You USAians have distilled complex issues to "yes, no", " with us, or against us", "right, wrong", "racist, not racist", etc.
The first past the post system limits the voting options to just two, which limits the power and decision making to a few people who aren't allowed to diverge from their voter-base.
A centrist republican voter and a centrist democrat voter can't both vote for a centrist party. They both have to make a decision of "republican or democrat". A working class USAian can't vote for a working class party - no it has to be one of the two parties.
It's much easier for both parties to make it harder for working class people to vote and garner votes from the middle class upwards, than try to serve the working class. Or, they just indoctrinate the working class to vote against their own interests - what option do they have anyway? It's not like they could vote for a third, forth or fifth party that represents them.
Both parties do little for the working class because they know they don't have to do much. Feed them propaganda on social media, have political ads that DESTROY, OBLITERATE, SMASH the other side (or whatever sensationalist word is used), make promises, claim moral highground and quote Jebus a few times, and the working class will for them. And if they don't vote at all, that's even better!
Yeah yeah, democrats do more than republicans, but "represent" the working class is a stretch.
The USA needs a multi-party system, possibly with preferential voting. The only people with actual representative are the rich, in the USA.