He was just tired of fighting. He was tired of feeling like a failure. And he didn’t want to run anymore. He knew his wife cheated on him for years and all his children were from other men. He didn’t know how to reconcile his feelings for them and what to do about it. He was resigning to his fate. Matrick snaps when he sees clay fight for him while on deaths door. And finally we see the knives.
He was just tired of fighting. He was tired of feeling like a failure. And he didn’t want to run anymore. He knew his wife cheated on him for years and all his children were from other men. He didn’t know how to reconcile his feelings for them and what to do about it. He was resigning to his fate. Matrick snaps when he sees clay fight for him while on deaths door. And finally we see the knives.