Sam looked at them with that never fading smirk which kind of triggered them even more. They felt like they had an upper hand at Sam since he has been defensive for quite a while.
But they didn't think that smirk would still be there.
The same smirk that stayed there when he was facing hundreds of enemies until this point is still there. He is not feeling any pressure that within their set rules in this battle, the trio would be any threat to Sam.
This is something they wanted to breach.
They wanted to get past that smirk and make him understand that they can follow him, stay with him and still grow.
To put it bluntly, the four of them don't have any other people in the world. The Evergreen family in the Star wood city is just a family of people that sheltered Philip for the sake of a transaction. He was never a part of that family, they are at most his benefactors.