The parties have changed since whenever you last read up on this (four years ago? ten years ago?).

Gop politicians (for Republicans call themselves this) don't care about deregulation anymore -- they just want to funnel money and power to the wealthy.

Dem politicians now seem very excited about breaking up Facebook and Google.

Both parties want to hurt Google and Facebook for perceived political bias. Gop politicians want this because Google and Facebook sometimes allow some left-of-center voices to occasionally penetrate their newsfeeds. Dem politicians want this because Facebook has been a vector for QAnon and other wingnut-terrorist radicalization.