Me personally I think of you using the word "enabling" made everything you said lose a lot of validity and actually makes if you've never been in a situation like an enabler. I don't think of what everyone in the harem is enabling, especially giving that one of the first interactions with the girlfriends is her to become a more open person. I think you're problem more stems from your first point:it becoming too serious. A lot of the stuff in this manga aren't and when they are most of them outside of this and maybe 2 others often is used as the butt of the joke. Which is why in general we don't see much of a character's personal problems outside of there introduction.
Also as someone who has lived with an enabler and lived with a enabled person it is completely different. The girls never act like her problem is perfectly ok or needs to be sympathized with. Especially with what you put as the main enabler the bf. All the characters have very big problems but because there are conferable with and around each other it seems as less of a problem. She being with this group of people has made her virtually becoming a different person especially with this chapter from not being able to say a word the one she liked without a book to actually speaking to her life long abuser mother. Also knowing a enabler if he really was one he wouldn't even have truly acknowledged the point or really even care about the point of it at all. The thing about enablers is that they do it unconsciously and they usually refuse to point out or even think about the people on the other side of the spectrum. When someone becomes a enabler they will not even call out that person there enabling in a any negative light and only see other people as the problem and that her problem is usually never even brought up. The only time he relates to enabler is when him talking about her good points instead of the bad ones but when you your like the woman and is only saying terrible things towards her I doubt anyone wouldn't do the same. The only reason the bf even won this argument is because of one point which was something that the mother never took into consideration.
Calling out the bf and the girls more than the woman who verbally and physically abused since there condition started feels weird to me. She only saw her own daughter as a weirdo that needed to change as soon as possible but when she takes any step in the right direction she gets shot down. Unlike with everyone else the mother has blatantly ignored her not only as a mother but also as a person so even if you want to call them "enablers" than the mother would still be a horrendous person for treating her own daughters life as a nuisance. Giving her a the ability to conversate with everyone at the same pace with everyone without discoursing her to speak isn't enabling it just making her easy to talk to compared to a parent actively disabling her to try anything different and just trying to force her to speak. Trying to call them enablers is like telling someone who's trying to work out to do things slowly instead of trying to max out a enabler. Getting into things, definitely with personal ones and trying to instantly fix and issue will become a problem before a solution, which is perfectly exemplified between her and her mom.
