Does anyone else find it slightly unrealistic how Ron was allowed to have フレンズ stay during the holidays but we never saw any of the other Weasley children have フレンズ over?

Not at all.

For starters, the twins and Ginny were all フレンズ with Harry and Hermione too. So, I'm not sure why the would complain? Especially since they all knew what kind of home-life Harry had.

And the twins did have friend's over for at least one occasion: Lee was at the wedding. Ginny danced with him. And Ginny was フレンズ with Luna, who lived pretty much 次 door.

Also, the twins, despite their bubbly personalities, weren't very social. Beyond Lee, we don't really see them have any kind of close friends. They pretty much only hung out with each other.

あなた also have to remember that the 本 put very little focus on anything that didn't directly involve Harry. How do あなた know Percy and the twins didn't complain? How do あなた know they didn't have フレンズ over every once and a while? Just because Harry doesn't see または hear it doesn't mean it didn't happen.

For having Harry and Hermione invited over and over in the holidays, firstly here we are talking about the boy who lived of course he will have special treatment, secondly Mrs. weasley is a kind woman, she is sympathized with Harry, he is orphan and lonely and his aunt treats him badly, she will treat him like a son, and for Hermione, Ron loves her and she didn't came to the Weasleys the much like Harry. the twins 愛 Harry, but they are annoyed of Hermione and always in the book arguing with her, and for Ginny she is fallen in 愛 with Harry since the first book, and Hermione is a close friend to Ginny.

Actually I think it's because Ginny and the twins enjoy having Harry and Hermione over so they're kind of like their guests too.

I find it annoying. I just felt like they got to come over because Harry was the boy who lived and an orphan while Hermione was a muggle born.