You are underestimating FGO power.
FSN was the most successful eroge but it never went outside of otaku field until Zero and FGO is the new normalfag overlord and ended up luring in even the otaku who kept away from TM.
UBW already had lower sales but FGO saved Fate from fading into irrelevance. After the second movie RN and HA went up in sales, meaning a lot of those who watched the movie haven't read the VN. And why they even watched it to begin with? How they knew of the title and the heroine? FGO.>>192070006
She still felt like the people she unconsciously killed before deserved it. Because the shadow was feeding on her innermost feelings she suppressed her whole life. She speaks about it in a scene Sudou conveniently cut. Just like all scenes that make her controversial. Some of the changes were absolutely unwarranted even back in the first movie.