Removent of discoloration

After seeing that I messed up the straightening of the previous photo, I tried another bus window image and simply used the Auto button in the Levels dialog.

I've found that the best tool in Elements to remove a color cast is the Levels tool.  Here is a quick example of a photo taken through a bus window.  In a Levels Adjustment layer, using the grey eye-dropper and clicking on a neutral grey color in the photo is all that was needed.

Of course, taking out the window's reflection is a little more difficult.  😎

Read this if my suggestion does not work for you.

https://helpx.adobe.com/photoshop-elements/using/correcting-color-casts.html#:~:text=Remove%20a%20color%20cast%20automatically&text=Choose%20Enhance%20%3E%20Adjust%20Color%20%3E%20Remove,to%20the%20image%2C%20click%20Reset.