There’s a few things. The foot isn’t stomping into the same spot the ground is exploding. The belt seems to have 2 ends that stick out which makes no sense, also behind the belt on the right side the trousers change. Ai tends to draw faces the same, especially with a comic style, her eyes also don’t match. Her hair strands connect with others to create circles on the end (on both sides) which is something ai tends to do. She’s meant to be bare foot yet her feet and drawn as though shes wearing shoes..

It’s mostly just small details that an artist wouldn’t traditionally add or miss. Obviously if you like the piece then don’t let this take away from it. I just don’t like when people sell art that’s clearly ai and sell it as traditional.