I would strongly suggest reading State and Revolution to understand the reasoning on the function of the DotP. It is fundamentally oriented towards the tendencies of power and people following self-interested motivations in aggregate over time. No one is talking about “giving up” anything. The proletariat is to oppress the bourgeoisie by means of more genuinely democratic governance (that obstructs the power of capital that is exerted in liberal democracies) and erode the bourgeois class over time until it no longer exists. No power is surrendered at any point in that process, but the people who need to be oppressed are decided on class lines that cease to exist by the very same process as the class is oppressed.

You can find both text and audiobook versions online pretty easily, and hopefully the most famous work of the founder of the first Marxist state is not on the same level as QAnon manifestos to you.