Some people aren't pleased with the outcome of the romance, but to dislike the story overall for that seems a weak reason for me. That's like disliking Clannad ,
For me it wouldn't have mattered who Shingo ended up with , as long as the developments to it were realistic and/or believable (unlike a certain Feng eroge adaption last year >_>). I would even have been content with Ange if the anime pulled it off believable, eventhough i liked her story the least of all heroines.