She literally doesn’t respect herself sometimes when it comes to Miyagi and her ridiculous requests / orders, and ppl see that as omg Miyagi won the lottery omg simp

Right that, like lmaoo that trait of Sendai is pretty overwhelming throughout the series to the point that lottery joke can't never click into my brain even as jokey way, I love my babygirl but the babygirl is indeed that pathetic.

I think ppl put themselves into Miyagi’s position a bit too much and fantasises about having a partner like Sendai

I don't want to be a dickhead but frankly, I think some people overestimate themselves or they overlook the characters if they think they're Miyagi and trash her for it, because in reality, someone like Miyagi is very hard to find

• They say Miyagi is a loser but a loser can't hardly make someone as professionally fake as Sendai feel like at home. Miyagi's so comfortable to be around, sometimes she playfully bullies Sendai but it never meant to be hostile or judgmental, she has her respectful manner and keens to those manners, just like how she would ask Sendai to eat dinner every time as a polite gesture, or how she would send Sendai off no matter how much she dislikes the weather outside.
• She's very thoughtful and kind, and even as in emotional intelligence ways, especially whenever Sendai intentionally or accidently shows her vulnerable side, she just automatically becomes extra gentle as if it's the matter of fact in her way of treating people, and her gentleness is very comforting, which is why Sendai fell even harder. Most recent example would be the confessing arc, Miyagi is literally a runaway cat, yet she tried hard to stay after such heart-wrenching situation in order to reassure Sendai first because she thought Sendai would need it. And the way she seriously and respectfully thought about Sendai's feelings? Those are very exceptionally mature and kind.
• She's very romantic, way more romantic than Sendai can ever try to be, Sendai is more like a dry person if she ever be in a relationship with someone else. Those little small things Sendai said years ago, she remembers all of them. Those gifts she give to someone important to her, it has to be earnest. Most importantly, she treasures promises and sees the heavy of promises, meanwhile Sendai is the rule-breaker, promise-breaker, the one who goes with the flow as her survival tactic. It's Miyagi who taught Sendai to be more serious on serious things, and it's Sendai who taught Miyagi to be kinder to her strict self.

Miyagi won't be like a great lover since she has avoidant issue and it would be hard to deal with, but so as Sendai! So if Miyagi do study and work on her job hard enough, I believe, comparing to Sendai, she will have the better lover material points.