I'm reserving judgment until episode 13 is done and over. We could still see a turn around, and nothing has been truly decided.
Only thing that's bugging me is the *why* of Shin's mom being so mean spirited to Hiromi. If they never explain it, that will be sad writing. "I always knew you didn't like me," isn't a reason.
On another note.... Hiromi warming her hands to the burning of the departed bike was both disturbing and hilarious.
This is still the best show I've seen this season.