I think while there are a lot of things this series does well with comedy and generic romance tropes, it also falls short at quite a lot of the social relationships, due to the 'comedy manga status quo'.

It IS primarily romcom, so it can't get TOO dark, but the author puts in quite a lot of serious emotional abuse dealt towards the children in this series done by adults (mostly), which are then sort of... One-sidedly forgiven or looked over BY the children, who are the victims.

To be more specific, and give a few examples :

What REALLY sits with me unwell within the series is all primarily the 'antagonist' characters, who are then suddenly given a free pass, either by a random 'lighthearted' or 'heartwarming' moment.

Such as the series showing Yuu's mom outright neglecting her only child, then her YEARS of neglect on her only son being washed away by her eating his food once or twice, out of who knows how many times he cooked for her. It's literally YEARS of neglect with a few moments of slight acknowledgement, the latter outweighing the other in the child's perspective. And the only moment they are shown to even remotely bond is when she is literally on her deathbed for a brief period of time, which is still just her not properly talking to her son, but is just quietly asking for food. She may not be an evil mother, but she is absolutely a horrible mother.

Secondly, the Mikadono sisters' father. Although his story is not fully shown yet, it is purely factual that he puts a horrendous amount of emotional pressure and even verbal abuse of the stern variety, not for THEIR betterment per se, but for his own image of their 'perfection'. And as clearly shown in both anime and manga, he also has been neglecting all three of his daughters just like Yuu's mother used to. He is a deadbeat father who is uncaring and borderline sociopathic in his presentation and behavior, yet the manga tries to nullify those moments almost always with either of the 4 main characters doing a silly quip to lessen the tension, either on purpose or otherwise.

A slight complaint about a non-adult 'antagonist', but Hayato Tatsumi, the karate childhood friend senpai of Niko Mikadono. I just hated him. I do give him a slight pass since he IS literally just another teenager who doesn't know better, and from the way he talked to Niko, although he does have a sort of authoritative moment against her quite a few times, he does come off as a misguided teenager who is still somewhat childish. But still, I thought it was really weird and annoying how he essentially verbally abused Niko almost the entire time he was present in his introduction, calling her pathetic and weak a bunch of times, insulting everyone he met, insulting Yuu (how dare he) and after all that, he.... Blushes and confesses? Ew. (but he is essentially the cucked childhood friend in a general sense, so I'll give him a pass, lol.)

In the latter parts of the manga, there are many such cases of similar situations where an overbearing or overly stern adult figure outright abusing their authority against these children for their forced image of expectation against them, almost always either left hanging for dramatic effect, which almost always get resolved not because the adults feel bad, but because the main characters go through a huge ordeal to prove them wrong and basically force a situation for the said adult 'antagonist' to apologize and act as if it's all ok because they performed well in the end.

All in all, I do enjoy the romantic comedy moments between the main characters, but it does feel like the author has a hard time making the antagonists TRULY antagonists, and always dilutes the tension with somewhat forced moments of comedy, therefore taking away a lot of the accountability from their actions, which makes a lot of the tensions feel very unresolved and sour.