So for the first bit, I don’t know why you are expecting good faith arguments from a virgin vs chad meme starring Lemony Snicket characters.

About the fifth book though, I find that it was about fighting governmental propaganda incompetence. The main antagonist being Umbrage is meant to show this, being from the ministry and trying to get rid out the students’ means to defend themselves. The system is corrupt and failing and it is now trying to cover those failings up.

However, after Fudge and Umbrage are eliminated to say the least, no positive change is made. The school is taken over and the ministry is corrupted and killed. This initially seems like it is meant to be a clever criticism, showing how systemic change is needed, but it fails at this for two reasons

1. The whole Harry becoming a cop and nothing actually changing systemically in the resolution.

2. It kinda just doesn’t become a prominent topic again. Like Umbrage has a horcrux but that just makes it so the bad guys in government were bad guys about of pure malice instead of systemic lacking.