While I dropped this novel midway because I cannot stand Orig Host‘s family, I knew all the point you mentioned above. My problem with the family is....
How hypocritical and self righteous they are.
No parents is perfect, some are attentive and sensitive about their children and some didn't even notice when their child get bullied. I won't say they are right or wrong. I don't mind greedy parents, everyone have their own selfishness. But my problem, this family is greedy but pretend that they aren't.
Point;
1) The cousin stated that he did got his position because of MC's connection, but even without MC's connection, he can get to that position by his own effort albeit later. (It sounded like "thanks but no need for your help, but since you offered, I'll reluctantly accept it, but to be honest, I don't need it.")
2)MC's parents and MC's maternal family each live in the house that was given to MC at her wedding. The family narrated: They knew that the house that they currently lived belong to MC, so they didn't do any change to the house, once MC asked them to move out, they will. (yeah sure)
3) When MC was pregnant. You'd think that they'll be happy because they'll get a grandchild but no. The reason they're happy is because through this baby, the blood of Su's and Qin's will flow through ML's family. ML, although was their son in law, but their blood didn't flow through him. ML was still a stranger, but the baby was different.
4) When they were keeping low profile, the narration went like this "they weren't stupid, they wouldn't do any foolish action. In any case, MC was married to ML. Later when they got children, the child will have Su and Qin blood in them, so later on the child will have to respect them as elders." (I think if there's a sequel about MC's children, this family will appeared as the shameless annoying parasitic relative)
They're selling their daughter (orig host) but pretend that they're doing some great goodness for her and that she should be grateful to them. They were deciding her life partner as if they were deciding her major in university...
As for the original host, rather than blaming the family, I was more feeling sad for the original host. Yeah, because MC was distancing herself, it's probably then not her parents' fault. But imagined that someday you disappeared, yet no one notice, no one was feeling sad about your disappearance, because no one know, no one grieved for you, it's like you're forgotten, didn't matter at all. In the end, the one that even suspecting something was going on was the egoistical scum ex boyfriend, while the one that supposed to love you the most (your parents) didn't have any hint of suspicion at all. (me having existential crisis)
All in all, this novel is just not my cup of tea. The interaction between MC and ML was actually quite cute but that family just annoy the hell out of me. If you don't find the family annoying, then this novel actually has a good story.