For some reason, my design is blurry?

So recently I’ve been working on a graffiti design for hoodies and I worked on it for hours to perfect it. 2000x2000, PNG and looks perfectly fine in the original file. So I uploaded it to my shop (not launched yet by the way) and here’s the thing…

It looks hideous and pixelated. I never had this problem, I tried all kinds of re-sampling and exported it many times but still looks the same, so that wasn’t the problem and I spotted a few bad spots so I fixed them but that wasn’t the problem either. Tried all the different formats other than PNG and still looks the same. Tried resizing, bigger, smaller, nothing looks any better. What could be the problem?

Any help would be appreciated.

Can send us a link to the product where the design is pixelated? Or give us the Design ID so we can check?

Thanks!