I dropped this story because I didn't like how they portrayed the entire case of the ex-fiance. Call him a dick all you want, but I legitimately couldn't go on after realizing that he was basically unable to get any success in his as an apprentice because the FL had isekai knowledge and could make things that were far ahead of time and take all the credit for it. He had to suffer because she had a cheat of isekai knowledge, which made him develop an inferiority complex.
And he tried to get her to rely on him so that he could feel like he could stand something in life, but she didn't even let him have that, basically making him feel like he's worth nothing.
Yeah, I'm sure I'm supposed to root for the FL because her ex did bad things to her and likely will do in this story, but I just can't follow the FL after realizing that she basically abused her knowledge to make tech that served more for her to get ahead without considering how others feel. And if I can't support the MC, I can't follow the story.