Through the Living Hope

My point is that Hagrid is saying every dark magic user came from Slytherin with no exception, yet in the context of the world he would know that is not the case. Hagrid would also have had Slughorn in his time at Hogwarts and would have known that there were good Slytherins. In the game Hogwarts Mystery, there are two very wholesome Slytherins in the player’s year with an interest in Magizoology

While yes there are a disproportionately large amount of evil former Slytherins, my point is that not every Slytherin is evil and not every evil wizard was in Slytherin

Yes, but all dark wizards come from Slytherin is not the same as saying either all Slytherins use dark magic or even all Slytherins are evil. You can be a messed-up person and never touch the forbidden curses or any 'dark magic' (which is a very nebulous term in HP, so take it with a grain of salt)

I’m just saying that not every evil wizard was Slytherin. Case in point, Peter Pettigrew.