@Call-Me-Captain Speak for yourself, now that the generic revenge is out the way which was most likely used to set up another part of the story where super humans like our MC here all gather to fight another enemy is far more interesting. Unless you're talking about the dragging on than I concur.
Sounds like the MC doesn't do any foreplay with the princess, you have to train and break her in before you insert something that huge into her. No wonder she screams that it hurts.