Novel vs manhwa Ludwig

I always felt that there was something inconsistent with the ml's character writing,like the ludwig before the timeskip is completely different from the ludwig after the timeskip,so i decided to check the novel out.I haven't really read the novel but from I've gathered,the ml's personality is completely different. In the novel,he's actually a psychopath who loves killing and did horrible things to get his hands on fl. Most of the novel readers hate him. Also unlike the mahwa version,he never feels any remorse for the things he's done and in his 2nd lifetime,he still kills innocent ppl,he just makes sure that fl doesnt find out about it. In the manhwa, he's just a puppet to the entity in his body and is an idiot in love. So im guessing that initially they were going to stick to the novel version but maybe later decided that everyone will hate the ml,so they changed his character. I prefer the change,i feel the current ludwig has so much more personality to him and you dont really see many mls with his personality.Honestly you can't even say he's been whitewashed coz the both are 2 different characters. Also I think it would have been interesting if they stuck with ludwigs original personality but instead made him feel remorse and try to genuinely become a better person.