Maybe he was blamed for some trouble he didn't actually cause. For example, if something went missing in the orphanage and the caretakers wrongly thought Naruto took it.
Naruto's view of the world and people around him might change drastically. He was already an outcast, but being kicked out of the orphanage could make him more distrustful. He'll have to learn to fend for himself, which could lead to him developing new skills. For example, he might become better at stealing food to survive, but at the same time, he could also meet some kind - hearted people who will help him and teach him better ways to live.
One possible reason could be his unruly behavior. Naruto is known to be a bit of a troublemaker in the series, always pulling pranks. In fanfiction, this might be exaggerated, and the orphanage might not be able to handle it anymore. Another reason could be that he's suspected of being involved in something dangerous or illegal, even if he's innocent. For example, if there are strange incidents around the orphanage and Naruto is the easy target to blame because of his reputation.
One possible reason could be his prankster nature. Maybe he played one too many harmless but annoying pranks on the staff or other orphans, and they decided they'd had enough. Another reason might be the fear of the Nine - Tails within him. Even if the people in the orphanage didn't fully understand what it was, they could sense something dangerous about Naruto and wanted to distance themselves from him for safety reasons.
Naruto might start to develop his ninja skills earlier. Without the orphanage, he has more freedom to explore and train. He could find hidden training grounds or meet mentors in unexpected places. His determination to prove himself and show that being kicked out was a mistake could fuel his growth as a ninja.
Naruto's life becomes a lot more difficult. He has to find shelter on his own. He might start sleeping in abandoned buildings or under bridges. He has to scrounge for food, which could lead him to steal at times. His loneliness intensifies as he no longer has even the meager company of the orphanage. He also becomes more distrustful of people, thinking that if the orphanage could reject him, so could anyone else.
The villagers themselves could be the antagonists in a sense. They have always been somewhat afraid and resentful of Naruto because of the Nine - Tails. Their constant negative attitude towards Naruto could influence the decision to kick him out of Team 7. They might pressure the village elders and Kakashi into believing that Naruto is not a suitable member for the team and that he poses a threat to the safety of the other team members.
Perhaps Naruto's uncontrollable use of the Nine - Tails' chakra endangers the team during a mission. The village leaders see this as a huge risk and order him to be removed from Team 7. Naruto then embarks on a journey to better control his chakra on his own. He might meet some new friends or mentors along the way who help him become stronger and more in control, and eventually, he tries to make his way back to Team 7.
No. It's completely unfair. Fanfic is a form of art and self - expression. Everyone should have the right to explore different themes, including gay relationships. Just because it's gay - themed doesn't mean it's inappropriate or harmful.
Naruto might initially be shocked and hurt. After all, being expelled by his own family is a huge blow. But being 'godlike', he could quickly turn that pain into determination. He might decide to prove his worth and show his family that they made a big mistake.