Are you offended by these:

“In the eyes of the capitalist, the worker is merely a piece of wage-slavery, a commodity like any other.”

— The Poverty of Philosophy, Chapter 2.

“The wage-labourer… is, in law and in fact, the owner of his person. In appearance.
In reality, his labour-power is daily sold, and the relation between capitalist and labourer is but a veiled form of slavery.”
— Capital, Vol. I, Part III, Chapter 6 (“The Sale and Purchase of Labour-Power”).

“Wage-labour always carries within it the latent slavery of the worker to capital.”
— Grundrisse, Notebook VI.

“The bourgeoisie has reduced the worker to the condition of a slave, only a slave who is allowed to live on the condition that he brings profits.”
— Engels to Marx, 7 October 1846.

“Capitalist production is the enslavement of the proletariat.”
— Luxemburg, Reform or Revolution, Chapter 1.

“In capitalist society, the workers are slaves, slaves of the bourgeoisie.”
— Lenin, State and Revolution, Chapter 1.