A dictatorship of the proletariat creates a democratic way to use the means of production which prevents exploitation. It is possible to exploit people under capitalism because the means are privately owned. If the means are state owned it can be decided democratically how to use them and nobody gets exploited.

I am begging you liberals to just be familiar with the most basic parts of Marxism

Read marx! Like actually google marx and read kapital or better yet Lenin's State and Revolution. Or google On Authority by Engels (this one is just a page long, read this and you can get out of reading the others, report back afterwards if you want!)

literally debunked by marx in the first few pages of the communist manifesto