The 36-year-old Portugal captain fired the 2016 Euro champions into the lead in the 15th minute after a stunning counterattack at the Allianz Arena.
Only minutes later Ronaldo followed up his opener with a superb piece of skill as he flicked the ball up and over an onrushing Antonio Rudiger.
The five-time Ballon d'Or winner then backheeled the ball away from Rudiger and found a Portugal teammate without looking at them.
Ronaldo's showboating was overshadowed by Germany's sensational comeback as Portugal's lead disappeared before half-time.
Ruben Dias and Raphael Guerreiro bundled the ball into the back of the Portugal net to hand Germany a 2-1 lead in the first half.
Kai Havertz and Robin Gosens added Germany's third and fourth respectively, while Liverpool forward Diogo Jota pulled one back for Portugal in the 67th minute.
Hamann has now accused Ronaldo of "belittling the opposition" and faced the repercussions with Germany's comeback win.
The 47-year-old ex-Liverpool star told RTE: "I think it's nonsense. He flicks the ball over, pretends he is going to catch it and backheels it across and looks away... of course it is [amazing] and we know he can do that... I think, in a way he's belittling the opposition.
"This is at 1-0 and I'm sitting here while you all rave about it. Yes, he is the best, with [Lionel] Messi... He looks a fool now. This is 1-0. He does look the fool.
"If you ask the German players, they'll tell you now what they thought of it. They would have noticed that.
"I tell you now, all of them will say it may have given us an extra bit of whatever to change things.
"What is he trying to achieve? Maybe this [Germany comeback] is where it all started."
Featured Image Credit: PA/Twitter
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