It may come as a surprise but some people have literally nothing better to do than to hate musk to an obsessive level.
But I do often see people claiming that others who are upset by various things Musk has done as being motivated by "hating Musk" when it's pretty clear they're motivated by being angry at something Musk has done rather than some blind hate.
You can tell that by the behavior of the one of them who bought it. ;)