Eh, Trump likes Sessions but just likes to shit talk and play it up. He hated Kim Jong Un too and look how that turned out. If he really didn't like Sessions, Sessions would be out the door.
Sessions is immune to media attacks due to being so clean and recusing himself. Media can't call for his firing or else next guy doesn't recuse himself and it's game over. For now, Sessions has the freedom to go after all sorts of human traffickers