I know you don't like Justin Rose, Alex. I don't understand that, but you're indulging in confirmation bias here.
He immediately and warmly congratulated Fleetwood in person as soon as he was confirmed as winner.
In his interview, the first question was "how disappointed are you?" He answered that. Then he was asked about Fleetwood and he was generous in his praise.
"I'm pleased for Tommy. He's battled hard all year and put a good week in South Africa last week and had a great couple of comeback rounds this week to fight back and deserve it. He's been leading all year and it's good for him to finish it off."
Gracious and ungrudging.
Finding fault with that is exactly the opposite. So behave!
Edit:
Here's the interview.