Brad Pitt and Angelina Jolie’s poisonous $500 million divorce slugfest has shattered their family — and now, after reviewing a mountain of sealed files, text messages, bombshell testimony and legal documents, RadarOnline.com can exclusively reveal how their recently decided custody agreement has split their six 𝘤𝘩𝘪𝘭𝘥ren down the middle — with the three oldest shunning Brad!

“It’s not the big win that Brad was hoping for. He’s getting the joint physical and legal custody he asked for, but there are contingencies,” tattled an insider.

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“His eldest kids never want to see Dad, and that hurts him. They’re on Angie’s side — and always have been.”

The couple’s three eldest — Maddox, 17, Pax, 15, and Zahara, 13 — have spent most of their time with Angelina during the divorce battle.

At one point, a judge was forced to order Angie to let Brad, 55, see them, and his camp feels she’s totally poisoned them against their father.

“These three kids are at the age where they can decide things for themselves. Brad is left hoping they come to see him out of their own free will,” added an insider.

Meanwhile, according to US Weekly, the kids, minus Maddox, spent Pitt’s 𝐛𝐢𝐫𝐭𝐡day together in L.A. on Monday, December 17. “Brad had the kids overnight — all but eldest Maddox — which was incredibly significant because it was the first time since the custody deal was recently reached,” the source dished to the outlet.

Despite that, friends fear Brad’s relationship with Maddox will never recover.

It was their ugly fight on the disastrous private plane flight from Europe to the U.S. in September 2016 that spurred Angelina, 43, to file for divorce.

“Brad’s very sad about what happened but accepts the relationship is deteriorated beyond repair. He won’t force Maddox into anything,” spilled the source.

Fortunately, the couple’s twins, 10-year-old Vivienne and Knox, were sheltered from the worst of the mudslinging in the custody battle.

The two “don’t have a lot of the serious issues their siblings do,” said the insider, because Angie did her best to protect them, and didn’t talk about the divorce in their presence.

Middle 𝘤𝘩𝘪𝘭𝘥 Shiloh poses the biggest problem for both parents, sources said.

The “Fury” star is slowly trying to repair their relationship and regain his 12-year-old daughter’s trust through therapy.

“Shiloh’s case is perhaps the most painful of all. She wants to see her father and is desperate to have some kind of relationship with him but she’s afraid of him, too,” dished the insider.

“Brad can be thickheaded sometimes, and Shiloh’s at a sensitive age. Brad’s trying to change.”

In an effort to bond with Shiloh, her superstar dad has brought her into the family business! Friends say “Shi” has shown real acting talent and Brad has encouraged her to follow in her parents’ footsteps.

Father and daughter are finally beginning to bond — and that’s infuriated Angie, who believes Shiloh is too young for an acting career.

“She’s been struggling,” an insider spilled. “Shiloh even ran away from home last summer, and it was hours before anyone realized it.”

It wasn’t just Brad’s admitted drinking problem that wrecked his relationship with his kids. The divorce files revealed serious concerns about the Hollywood hunk’s state of mind.

“Brad’s mental health was called into question,” the source divulged.

“The 𝘤𝘩𝘪𝘭𝘥ren explained he mistreated their mother, and he was moody and indifferent to their needs.

“He’s been ordered to get individual counseling for his psychological issues while continuing his recovery for alcohol addiction.”

But while Brad has bounced back from his darkest days after the split, “Maleficent” witch Angelina continues to spiral downward.

The Oscar-winning actress is thinner and paler than ever, with insiders revealing the divorce has ruined her already fragile health.

“Angie can’t sleep,” said a family insider.

“Her vicious battles with Brad have kept her up at night! She now suffers from terrible insomnia — which leads to crippling anxiety.

“She’s a bundle of nerves and worries constantly.”

“She’s also losing weight again at an alarming rate!” added another source.

Dr. Gabe Mirkin, a longevity expert who has not treated Angie, said: “Lack of sleep is associated with diabetes, heart attacks and all sorts of mental problems!

“It can cause depression, poor decision-making, mood swings, loss of memory and decreased alertness.”

Although the custody agreement has been signed, the war between the exes is far from over.

Brad and Angelina are still duking it out through their lawyers, and their bitterness and equal desire to win at all costs keeps doing more damage to their fractured family — making their battle more bitter, expensive and full of twists and turns than any of their blockbuster movies!