When you use the eraser tool, as you did in the reds bit above his left ear and in the top left, the final results looks a bit jagged. If you're going to do it, best to tone down the opacity levels. Additionally, there was quite a bit of red background left over in these bits, but there isn't much you can do since photopea doesn't allow snow removal using the transparency lock button.

@muserock2a this one will produce a less blurier cut