Well. people are giving high rating for this... The saving grace of this manga is the end note about how this story is a dumping ground for the author hatred, envy and all that thing. Just like it's said, it's justification of how it's "Trash". That's why it has to be like this. I'm surprised the ending is not going way darker.
sure its an art in it self, about how realistic it is, of how things is not always pretty and solvable. But that's a pessimistic way to see it.
In my opinion. a story is especially *amazing* when it betrays our common expectation. about how the main character grow defying what he/she is going to be in our expectation.
this is half-assing everything in that regard, if its mainstream, she finds happiness in the end, maybe in a epic way. if its tragic, she might be ended up holding her breath, only to find a salvation in ending everything.
it could go even darker, she ended up killing everything and burning the house, laughing hysterically in the end page. but this...well. "Trash" i guess. 6/10 for me. that last note is a great confession for the author for this story. a waste of time that left a feeling of unfinished business, in a bad way.