Tech bros Jeff (Ramy Youssef), left, Venis (Cory Michael Smith), Randall (Steve Carell) and Hugo (Jason Schwartzman) debate how to deal with a social media platform failure in “Mountainhead,” premiering Saturday on HBO. Courtesy of HBO

“Mountainhead” — 3 stars

“Succession” fans rejoice. Jesse Armstrong has again gathered together a conclave of uber-wealthy megalomaniacs in a delicious satire.

“Mountainhead,” which the “Succession” creator wrote and directed, is a new made-for-HBO movie that leaves behind the backstabbing machinations of media moguls for the not-any-better power plays of tech billionaires.

Or, at least, three billionaires. Their host for a poker weekend in the mountains at a sprawling estate named after Ayn Rand’s “The Fountainhead” is Hugo (Jason Schwartzman), the

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