Everything is Mona’s fault

I love Mona as A! My only problem is that I don’t understand why the Liars don’t absolutely despise Mona for what she did? I mean isn’t she the reason all the bad things went done that happened? If she didn’t become A then Charlotte wouldn’t have become Big A and then AD wouldn’t have happened or do I get that wrong? I feel like she isn’t really held accountable enough by them. I understand that she was held captive in the dollhouse too but still. Especially by Hanna? What do y’all think?