Brow trim is a little uneven, in the middle, you'll notice in the reference lower down that hardly any white is seen between the brow and eyes, gives the meaner Hero look
Also you could touch up the ends of the frown/teeth at the moment they are a little short and appear to be angling upwards
For the traps and tears to make them look "hand painted" you could just go over with a black permanent marker, a little trick to save having to purchase more stickers, but hand painting from scratch still looks the best