Does he seem to take pleasure in his attack and in eating his catch?

Yes Grendel does. This is what Grendel likes to do. Yes he is rather on the lonely. He doesn't seem to have any demon monster friends except for his mother and really how much fun can that be? Grendel relishes who he will kill first and how he will sweep these pathetic vikings. He then tears these corpses from limb to limb in glee. I suppose it beats staying home at the swamp with mommy.