He was a child with the expectations of the country on him for 4 years and still brought home a medal, a lot of our experienced adult athletes couldn't do that.
Celebrations well deserved IMO.
You've got a kid who went to one olympics as a practice, had the country thinking/hoping he'd get one at the home olympics and his dad died before he could see him do it, after a long and horrible illness during which Daley had to train and deal with a horrible loss at a young age.
With trolls adding to the pressure having a go at him for letting down his dad I can't think there would be a single diver out there more relieved to get a medal.
Can celebrate however he likes, even though it was his team who grabbed him and threw him in the pool, they all work hard also and won at their home games infront of a mostly home crowd who all wanted him to win. If you can't "over" celebrate then I really don't know when you can.