Orwell is cringe and a snitch, but the thing anti-communists don't get about Animal Farm is that it isn't even an anti-communist book. The ending is about how the pigs became literally indistinguishable from humans (meaning capitalism), which is bad because humans (again, capitalism) are fucking garbage. It couldn't be any clearer that the message is "Stalin sucks exactly as much as capitalism sucked".

Anti-communists somehow miss this and think the book validates their view that capitalism is superior. This is probably because they lack reading comprehension skills due to never reading any books besides Animal Farm.