Brazil's nightmare in Belo Horizonte saw them fall 5-0 down inside the first half-hour, with four of the goals coming between the 23rd and 29th minutes.
Maradona, working as a pundit on Venezuelan TV, said the scoreline could have been even worse for the "crushed" Brazilians.
"I had not liked Brazil at any moment in the tournament, but I did not think Germany would be so convincing," he added.
"Brazil had no midfield, and defenders Dante and David Luiz never worked together. The most serious is that we have been saying that Brazil without Neymar have no play -- today, they just hit long balls.
"But Germany always had the game in their hands. With the 6-1 [sic], I was about to call off the game because the [tennis] set was already over. They did not just roll over them, they crushed them.
"Every time they passed halfway, it was half a goal. If they paused, it was to just to tap the ball in. It is hard to pick out one player as, from the goalkeeper to their last substitute, they did everything well."
The 1986 World Cup winner adapted a song sung by Argentina fans in Brazil and reportedly used by Argentina players earlier in the tournament.
Sung to the tune of Creedence Clearwater Revival's 'Bad Moon Rising,' it usually begins "Brasil, decime que se siente" (Brazil, tell me how it feels), but Maradona changed this to "Brasil, decime que se siete," with siete being Spanish for seven.
The same pun on the scoreline was also used by Argentine paper Ole in its report on the game.
Brazil's players, meanwhile, were stunned. Right-back Dani Alves, an unused substitute, told AS he had never experienced anything like the six-minute period in which Germany scored four.
"In my 31 years, I have never seen this difference between the teams and conceded so many goals like that," he said.
"It is the worst defeat of my career. That decided the game -- I do not think there is much more analysis. Every one of us has our own responsibility to take on. But of course I am very proud of having formed part of this group. We gave everything we had."
Real Madrid's Marcelo, who had a torrid night at left-back, said everything had gone "black" for the players.
"It has been a nightmare, a horrible night, the worst of my career," he said. "The six minutes when they scored four goals... the light went out, you saw everything black. We did not know what to do."
Broken-hearted Brazil bow out
The ESPN FC crew review Brazil's stunning exit and explain how Germany were able to exploit a vulnerable Brazilian back line.
ESPN FC show 7/8
The FC crew break down Germany's demolition of Brazil, preview Netherlands vs Argentina and discuss the latest transfer news.
Germany outplayed Brazil
Brazil's World Cup dream was shattered after an astonishing 7-1 defeat against Germany at the Estadio Mineirao in Belo Horizonte.