Towards the end some of the writing became pretty bad ("I like you because I like you"? Seriously? What are we, twelve? No, probably at that age you are past that level of sophistication). Triangle was pretty weak despite the good start/premise (timeskip that lasted years, and no action from one of the "angles"?) due to lousy script/writing. Last scene on the rooftop with 2nd ML was also pretty lame dialogue-wise (justification did not make any sense, they both went after her to help her, he was a step behind in acknowledging his feelings). Actually, I found the whole "I need someone to swoop in and save me like you did when we met" spiel a bit insulting to FL's character, given that she is supposed to otherwise be a strong and independent female character (and she is competent and generally with a good characterization).

Not sure about ease of mom, etc. acceptance back into the family (particularly because the question "would she/they have gone back had the husband/father not been so scummy?" remains, on the other hand they did this all "above board", she divorced, it's not like she cheated or anything, and I do think that In-Jae being a kid at the time is a distinction worth making when judging her actions), on the other hand she was so helpless/comic that you just couldn't dislike her, and the scenes were just not written with that kind of dramatic overtone, so it felt ok. To be honest, this is not something that bothered me the way it was presented. Essentially, I might have hated them in a more "dramatic" presentation, but here it was all very lighthearted, and when you see the mom trying to go in internet cafes, etc. or competing with kids for poster it's just funny... In-Jae's conflict is interesting, and she is a strong and competent female character that makes her own stand, you cannot help but respect her.

Had a bit of 2nd lead syndrome, would have been good to see it resolved a-la Hometown Cha Cha Cha, where 2nd lead was paired with someone else, in this case they had In-Jae that would have been perfectly positioned (at least after the last time skip), character-wise they are similar (serious, professional, elegant), she is basically the person he interacts with the most of the trio in the final timeskip (plus the other two are paired), could have also been just a hint as in the final episode of Itaewon Class... Nothing, which to me was again some lazy writing.

On the other hand, the drama was pretty unique (the only one of its genre), and I found the tech part rather believable (not Mr Robot levels, but they used Python ML libs when talking about ML which compared with the squiggly terminals you see in the average computer scene is miles ahead.