"overwhelming for him" is a grammatically correct and usable phrase in written English.
You can use it to indicate that something is too much for someone to handle or to process. For example: "The amount of work assigned to him was overwhelming for him, so he decided to ask for help."
"Life," Mrs. Martin says, "is overwhelming for him".
He comes and goes – sometimes, relating his life is simply too overwhelming for him.
"The best part is just seeing this," Jones said, adding that it could be overwhelming for him to be on the sideline for his first professional game.
But on that June day at Nike, the pain that exploded up from his back was too overwhelming for him to hide or deny.
At other times, it looked like Obama's beauty was too overwhelming for him and perhaps he might break down and cry.
US Weekly claimed that Biebs being bothered by the effects of constant attention and fame in the US is related to his move, which its source explained as "overwhelming for him".
"We allow him to work remotely, as the office would be an overwhelming environment for him," said co-founder Sam Williamson.
The Yankees tried harder to acquire Lee, and though they missed him now, they will probably make an overwhelming push for him this off-season.
He said: "There has been overwhelming support for him, except from a dissident cell from what one might call the production team".
The issue also plays directly into Mr. Obama's own need to re-energize younger voters, who turned out in overwhelming numbers for him in 2008 but seem far less enthusiastic these days.
Jeremy Corbyn's hopes of remoulding Labour have been boosted by a detailed Guardian survey into the party at grassroots level that shows overwhelming support for him, a decisive shift to the left and unhappiness with squabbling among MPs.
