Assassin X's feed

Assassin X created a topic of Secret Resurgence

Throughout reading this I felt that if the ML loved mc so much, he would never rape him. It feels like the author just made him rape mc to write a dog blood plot so the the ML is always apologizing.
It's like a complete change in attitude, from all his actions even letting hae min go to ming with that envoy, he was willing to let go. Why would such a man commit rape? Why do authors do this......make ML a rapist and have him grovel all of the manga. No one wants a rapist as a lover.