If art is subjective how can anyone really critique it? Some artists choose to reject all formal skills and techniques and adopt a more emotional approach?

When critquing art pieces with subjects, you first always think about the subject and what people always feel towards that subject. then you see start looking at the artwork itself and seeing what the artist is trying to protray to you. from there you start crtitquing them very lightly about what they couldve done to make the piece better