How to fix Object bluer issue in unity 2022.3.4f1. I am try many times but this problem is not fix

Question

In this image cube was not show clearly and every game object and text were not clear in 2D and 3D both I can try clear the text in 2D and clear object in 2D to see the video on YouTube, but video was too old this cannot work and same we can try these things in 3D.