I have to agree. The US is a two party system, which is extremely limiting. One party badly wants to become an autocracy while the other wants to erode compromise in favor of becoming a single party super majority. I wish anti-trust actions apply to political parties and break them both apart.
There are hundreds of political parties in the US; the stable equilibrium is only two competitive factions because of the electoral system. Breaking up currently dominant parties without addressing the electoral system won’t change anything meaningful. You need to fix the electoral system.
Specifically, the solid evidence from across modern democracies is that if you want multiple competitive parties, you need to adopt a system which tends toward proportional representation, like STV with multimember districts, and it helps further to maximize the relative power of the proportionally representative body (Tinkering with voting methods for single-member legislative districts wouldn't actually help much.)
Having winner-take-all elections for thr legislature, investing wxtra power in the less represntative body within the legislature, and having a strong Presidency that is indirectly elected all tend against having multiple competitive parties.