I totally get that. I think that was intentional though.

To me the book was less about an epic love story, and more about Patroclus not being able to see Achilles for how he really is (an arrogant asshole) because he's just SO consumed by his love. Patroclus idolized him to a deadly degree

Achilles decision to choose pride over happiness/love was repulsive. It made me sick to my stomach, more than any book has.