Nick Reiner ‘really resented’ dad Rob, ‘hated himself’ for not being as ‘prolific’

Nick Reiner, who was arrested on charges of murdering his famous father, Rob Reiner, “really resented his dad,” an insider exclusively tells Page Six.

Our source elaborates that Nick “hated himself for not being as talented, prolific or beloved as his dad or grandad.”

During his impressive 64-year career, Rob, 78, earned 90 acting credits, 55 writing credits, 32 producing credits and 30 directing credits, going on to win several awards for his expansive body of work.

Rob’s father, Carl Reiner, was also an actor, comedian, screenwriter, director and author whose career spanned seven decades and was marked by numerous accolades as well.

Meanwhile, Nick, 32, has been battling drug addiction for more than half his life. He co-wrote the semi-autobiographical film “Being Charlie” about his almost 20 stints in rehab, which was directed by Rob.

On Sunday afternoon, Rob and his wife, Michele Singer Reiner, 68, were found stabbed to death in their Los Angeles home, located in the neighborhood of Brentwood, with insiders claiming their throats had been slit following “a very loud argument” with a family member.

Sources also alleged that the couple’s daughter, Romy Reiner, 28, is the one who made the grisly discovery and told responding officers that a relative “should be a suspect” because they’re “dangerous.”

Page Six then revealed Monday morning that Nick had been arrested on charges of murder in the case.

He is being held at Parker Center Jail in Downtown Los Angeles, with his bail set at $4 million, a rep for the LA County Sheriff’s Office told us.

In a statement, the couple’s “heartbroken” family — including son Jake Reiner, 34 — described the “sudden loss” as “unbelievably difficult.”

Rob is also survived by a stepdaughter whom he adopted, Tracy Reiner, 61, from his first marriage to Penny Marshall.

He wed Michele in 1989.