Afridi smashed 76 off just 55 balls for the tourists before claiming seven wickets for 12 runs as the Windies were routed by 126 runs in the series opener.
"It was the most difficult pitch on which I have ever played," Misbah told Pakistan newspaper The Dawn.
"The ball was seaming and stopping, but it was Afridi's day, the way he batted and bowled."
Of his sensational performance, Afridi said: "What a pitch it was for me to bowl on.
"I just try to keep it simple, sometimes I get good turn off the pitch and if I don't get turn I try to bowl straight ones for leg before wicket decisions.
"I try hard and I back myself and I want to thank people back home. It's not time for me to survive in the team, but to give a lot to the team."
The Windies were skittled out for 98 - their lowest total against Pakistan.
Skipper Dwayne Bravo told windiescricket.com: "Overall, we're disappointed with today's result and we know we have to come back on Tuesday and make sure we don't make the same mistakes again.
"The batting let us down again and we need to get better to get back into the series and beat them.
"We have to get this defeat out of our system and come hard at them again on Tuesday. Afridi played really well with bat and ball and made the difference."
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