As Ellen DeGeneres and Portia de Rossi inch toward divorce, In Touch has uncovered more troubling details inside the couple's turbulent marriage.

An insider has exclusively revealed Ellen's growing success in her career has had the opposite effect in her relationship.

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“The richer and more successful she becomes, the more nervous and angst-ridden Ellen gets," the insider said. "Wealth and power have turned her into an angry and difficult person. If she had her way, Ellen would spend her time traveling and working for charitable causes. But she’s trapped and she’s constantly fretting over her ever-growing empire."

portia de rossi and ellen degeneres

Further, the insider revealed Ellen's growing empire has turned her into a "tyrant," and is now "angry and difficult with everyone," — including Portia.

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Unfortunately, this behavior has caused a shift in the star's normally bubbly personality, "Ellen is desperately unhappy and doesn’t have a nice word to say about anybody these days.”

Scroll through the gallery to see Ellen and Portia through the years.