I am having troubles with blurry exports. So, I will add smaller text or create smaller objects like circles or squares, and they look fine inside Photoshop. Then I export them and view them on my mobile phone and I see a blur around the edges of the text, squares, circles, etc. When I post that image to Instagram, it seems to make it even worse and more noticable.
I export with Save for the Web (legacy) and I have it in jpeg format.