Steve Wozniak is annoyed with the new iPhone X.

At the Nordic Business Forum in Stockholm, Wozniak, a cofounder of Apple, said the phone's power button does too many things.

Wozniak contrasted the high-tech phone with the simplicity of Apple’s early products.

When the iPhone X came out, Apple cofounder Steve Wozniak departed with tradition and didn’t immediately upgrade. That made Tim Cook send him one personally, and the Apple icon eventually spent two all-nighters with the flagship phone.

"I kinda liked it,” Woz said at an event in December.

At the Nordic Business Forum in Stockholm last week however, Wozniak backtracked on his earlier opinion.

Having opened the talk on a positive note — saying how he mostly “floats in a state of happiness” — Wozniak stumbled on the "only thing" that gets him upset these days.

"That's when computers and machinery tricks you.”

Case in point, the iPhone X.

Wozniak criticized the new phone’s lack of intuitiveness; specifically, the power button on the side of the phone.

“The power button on the side does different things if you click it quickly, or if you click it twice, and a different thing if you click it a third time,” Wozniak said.

Wozniak contrasted the iPhone X with Apple's early products, describing the Lisa computer as the epitome of intuitive user experience. “I like things to be as simple and understandable and direct,” Wozniak said.

“Of course with smartphones things got more and more complicated.”

Wozniak seemed to consider the iPhone X power button as an affront to Apple’s core principles — of intuitiveness, simplicity and “modelessness.”

He said the phone does different things “if you’re asleep or if you’re awake; or if you’re turned off or on; if you push it and hold it, it does different things; and if you double-click it, it does another thing; if you five click it, it does another thing.”

He went on.

“And if you push it with the volume button it does another thing. And if you push and hold the volume button it does another thing. Just, ugh!”

Wozniak's frustration doesn't end with the power button: Shortly after iPhone X launched, he told CNBC he was skeptical that the phone's much-touted Face ID feature would work as intended.