Listen. I'm perfectly fine with you giving my art 0 stars and lowering the score. It's stupid to expect 5 stars in everything and blind "loyalty" is not a healthy practice.
But, if you give me a low or even 0 star review, please tell me why you are rating it as such in the comments of the art so I can both change my practices and improve in the future. I want to know why you rated it as such, and if I get your feedback and criticism written out for me, then I can build upon it and improve. It's a win win for all of us. I give you better looking works, and I improve my skills.