First, I don't think the "both sides, illusion of 2 parties" narrative is at all accurate or helpful. Republicans want to implement psychotic policies that will fuck over most of the country. They are happy to do whatever they need to do so long as they get to be in power and make their money. They have the backing of insanely rich bastards and are corrupt to the core. Many of them are racist shit-stains or, at least, are more than willing to pander to racist shit-stains and incite violence against minorities to further their influence and power.
Since we have a two-party system, everyone else basically becomes a Democrat. There are a number of DINOs that are Democrats in conservative districts or states because it lets them leverage their position, like Manchin. There are many Democrats that have become dependent on a broken system of Super PACs, self-serving lobbyists, and rich/corporate donors. However, the majority of them are not racist shit-stains or corrupt sociopaths. Too many of them are or are misled, ignorant of reality, sheltered, or otherwise motivated to vote against the interests of their constituents. There always seems to be enough to halt or defang any decent legislation and it drains the party's morale.
That does not make the whole of both parties the same.