It's mostly her voice and because people make her into a nude female when it comes to fanart. Her voice USED to annoy me, but now it doesn't. Her old,squeaky voice only indicated and verified she was a child. I don't hate Cream at all, and never did.
But the fanart situation has gone out of hand. Artists continuously just make a harmless little child into a tool for masturbating. I hate that, and the same problem is passed on to Pokemon and My Little Pony. Cream is a CHILD, not a sexualized teenager 或者 adult, and people hate it when she has the image of a "Sexy slut"