I'd look at this as an opportunity to spruce up this bathroom.
One option would be..
There are several brands of thin wood patterned plank "peel-and-stick" paneling out there. They are perfect for giving small areas a face lift or a touch-of-class. This would be a perfect application. They come in packs of certain lengths, and then you'd just measure, cut with a razor knife, peel and stick. It would get rid of that factory stock look, freshen up the bathroom and cover the problem. Then get rid of those mini-blinds and add a nice little deco shade instead and that bathroom would be transformed.
This "peel-and-stick" approach also can be done tile too.
Here's a list to get you started
https://www.google.com/search?client...UTF-8&oe=UTF-8