Poor Sprite Quality

nvm guys it doesnt matter anymore

What settings do you have set on the Sprite/Image itself? If you change around the import settings it might improve the resizing. Also if your game screen is scaled it can impact quality of the game screen in Unity.

Here is what I would try:

Change the import settings on the texture/Sprite/image itself specifically the Point/Bilinear/Trilinear setting and the compression method and quality.

I would check the scale of the game window.

I would check the quality settings.

Finally I would build the game and see if the effects are still happening.

Here is a test of import settings I did: