When you read something you don’t like try to see what the person who shared the idea might have meant. If you attack everything you dislike, you will get worn out.
If you don’t know what a person is like, do not judge them on the spot. Be kind, for heaven’s sake. Learn to respect people and their ideas. Ask questions. Dig deep.
If someone had said “Okay but I don’t think taking Regulus from Slytherin is good for the narrative, so I don’t agree with this idea and I think it takes away from both Regulus’ personality and the traits of the Slytherin house.” You know what I would have done?
I would have apologised for suggesting that Regulus should be put any other place than Slytherin and I would have explained my idea about the Hat Stalls.
It would have been a civilised conversation, now look what happened.
For someone who likes healthy discussions, this place is hell.