I've only read translations of the last couple of end chapters, so I don't know the whole progress, but I don't think that the end is so malicious as people think. Main reason male MC ditched both Hoshino and gyaru girl is because they were interested in him for the wrong reason (Hoshino because he did make up on her, and gyaru girl because he was a long lost friend). Those two were able to change their attitude against the world, but male MC didn't, he still had the same attitude and got to square one again. But during the last couple of pages, he starts to make contact with other people, and then is when his story begins I guess.
Tl;dr: Ending is probably not as bad as people think.