They are legitimately convinced there is nothing better. They believe representative democracy, private property, and free enterprise are the foundation upon which social progress is built. They fetishize the republican institutions while being blind to their outcomes. Any attempt to undermine these institutions is, in their eyes, and attempt to undermine democracy itself. To them, any societal ill can be addressed by building up upon the republican foundation. They legitimately don't understand that sometimes you have to pull out the weeds, roots and all.