The acceptance of suffering is a journey into death. Facing deep pain, allowing it to be, taking your attention into it, is to enter death consciously.
When another person makes you suffer, it is because he suffers deeply within himself, and his suffering is spilling over. He does not need punishment; he needs help. That's the message he is sending.
If you find your here and now intolerable and it makes you unhappy, you have three options: remove yourself from the situation, change it, or accept it totally.