You're making a mistake to assume liberalism genuinely wants to grant liberties to all classes equally, rather than specifically for the bourgeoisie.
>atomization of church and state
This is done to streamline power in the hands of capitalists. The state acts in their interests, and when necessary, religious institutions can be used to cynically promote pro-capitalist policy while being kept separate from general policy decisions.
>the seperation of powers to shift to democracyBourgeois
democracy, which should not be confused for proletarian democracy in which government meets the needs of the masses. Democracy as it's understood in the West is only designed to meet the interests and settle disputes among the capitalist class.
>the liberation of women
Liberalism "liberates" women insofar as it encourages women to participate in the workforce so that the surplus value of their labor can be harvested. It cares about women's rights only when impositions to those rights begin to interfere with women's ability to generate profit.
>empowerment of the masses
>why dont they believe in the atomization of corporations and banks
Because those are the institutions liberalism is designed to uphold, and represent, and empower.
I recommend reading "Liberalism: A Counter History" by Domenico Losurdo. He pretty much picks apart the myth that liberalism is anything but a deeply hypocritical and self-contradictory ideology designed from its inception to prop up the moneyed classes.