Rowling also said she regretted killing Snape and : LOL

Remus and Tonks, who just had a child? Heh
Fred, leaving George all alone? Well who cares
Colin, who was a child? Doesn't give a fuck

But SNAPE, the creepy man who held grudges and who was the greatest fear of 13-years-old Neville, a child whose parents were left permanently scarred by Voldemort's followers? Sure, poor man, he didn't deserve that :'(