Boateng played for McClaren at Middlesbrough.
He told talkSPORT: "Because of the England situation, it's been really hard for Steve [McClaren] back in England.
"I understand some of the fans' frustrations because everyone was so disappointed when England didn't qualify.
"His club record is phenomenal, the things he did in England, besides his success in Holland, are great.
"At the end of the day people have to look at the bigger picture."
"That's a huge compliment. I think he's a good manager overall."