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Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Is Hogwarts really the greatest magical school in the world?

Aside from the danger the students are in every year, the faculty leaves a lot to be desired. 

Snape torments his students. 

The rotation of Defense Against the Dark Arts teachers. 

Binns putting his students to sleep and teaching the same of subject of Giant/Goblin Wars. 

Divination as a class is a joke, Albus would’ve dropped the class entirely if it wasn’t for Trelawney giving her prophecy. 

Hagrid is a good guy and knows his subject, but he doesn’t have the qualifications to be a teacher. 

Also 1/4 of the students from the age of 11 are told to be dark wizards in training. No wonder their prickly.
gpt
No student has ever died for any reason other than 'Got in Voldemort's way'. Literally every single death at the school (at least, since the Triwizard Tournament was cancelled centuries back) is directly caused by Voldemort or his followers. 

Snape is a meanhearted, cruel bully who makes children cry and attempts to poison their pets, *but* he is also one of the greatest potionmasters in the world. Getting him to prepare you for your NEWTs is like getting a Supreme Court Justice to help you prepare for your LSAT.

Binns may be boring, but if you *do* pay attention and read the material instead of cheating off your friend every single year, you get a firm grasp of the major historical events of the wizarding world. 

Divination as a *subject* is a bit odd. You can see why they don't bother with it for the first two years, because you tend to get very little information if you aren't a full-on seer. The information you *do* get tends to be general - an omen, which you could react to in any number of ways. But you *can* get some information, and it's possible to interpret it correctly, so any nation that *doesn't* have a school that teaches the basics Divination will be at a major disadvantage. 

Hagrid is definitely unqualified, **but**, those kids definitely knew all about the care of magical creatures. Like that it is super dangerous and sometimes they shoot fire at you. 

As for the Slytherins... there are dark wizards who aren't from Slytherin, and *most* Slytherins do not become dark wizards. 

They're just your common, everyday racists, typically. But those will exist with or without the school.

But Hogwarts is considered the greatest magical school because it has produced a large amount of the greatest magical people. 

Merlin. Dumbledore. Even Voldemort. All world-changing geniuses of magic, all Hogwarts-trained. Even Snape, the only person we *know* invented his own spells, went to Hogwarts.