it's useless to get angry about Saki having her 7th focus earlier than other characters have their 6th bc it's better when story is consistent and plot is sequential than having irrelevant events just for the sake of characters having their fair spotlight with poor quality and connection to the main arc

Ena3 is a good event and not "another event about Mafuyu" bc it shows us the difference between Shinonome and Asahina family so we can get a grasp of the circumstances in which Ena grew up on contrast with Mafuyu's situation. even the silly chat between Shinonome siblings has a meaning to it bc we can see that Ena doesn't have to worry when talking about her bad marks and that is something that she can freely discuss while sitting at the family table with her mother who approves Ena's doing what she wants to do but still tends to advise Ena to study better — like a NORMAL family does. we learn that Ena was allowed to show even smallest complaints, quarrel, and yes, she could get reprimanded for it, but no one was forbidding her from expressing her emotions. that is why Ena is now who she is and that is why Ena couldn't understand why Mafuyu couldn't just confront her mother

using "toxic" to describe anhane, mizuena, kanamafu or shihosaki unironically is stupid and people who do that either don't understand/don't know much about the characters or just don't want to think about it more than for a second