The problem here is that mask isn't very good. Even despite the fact automation makes mask creation easier than it has ever been, there are probably still some skills you will need to practice. In this particular example, I feel a mix of semi-automatic methods and some manual editing of the layer mask should get better results, although fully manual methods such as using the Pen tool would probably work too. Manual methods don't work so well when the subect gets more complex, like hair and fur.
Anyhoo . . .
Try using Photoshop's Select> Subject functionality to automatically select the skier, then use the Select and Mask functionality to refine the mask. Decontaminate Colours will help remove any halos. Add smoothing, add contrast to keep the edges smooth but sharp. Forget about the chairlift bars at this stage, you can edit the mask later manually.
Note: There are tools within the Select and Mask workspace which will allow you to add or remove parts of the selection. The most useful for you in this edit is probably the top one, the Quick Select tool. Holding down Shift as you paint with the tool allows you to toggle between adding and removing from the selection.
After you've created a good layer mask, use the Polygonal Lasso tool to select the bars of the chairlift. Select the mask in the layers panel, and fill the selection with white using Edit > Fill. This will reveal the bars.
Here's the finished result. I'm toggling the mask so you can see it easily. It's almost perfect.