Things like the fence she put up wasn't certified and authorized and didn't have this thing, or a wire wasn't wrapped right, etc. Little things. Even other rescues were criticizing her. The food she used, the fact that she went on vacation once and left them alone, you name it. I even saw one comment where she was lambasted for calling Finnegan Fox "he". She gendered the fox, and that made the blue-hairs angry.
No matter what you do, even if you mostly align with the left's cause, they will find a way to criticize you. Remember, this is the LEFT we're dealing with. If you aren't doing/thinking/saying EVERYTHING absolutely perfectly and 100% in line with their vision, then you're a racist right wing nazi that needs to be punished into oblivion.
The left cannot reason, find middle-ground, or see logic. It's all or nothing with them.
As to "why"? I dunno. Because they're lefties. If they were capable of logic and reason, they wouldn't be lefties.