Player getting blurry when moving

I added collisions (Box Collider 2D, RigidBody 2D) to my player (Also I changed my Player Controller script to support collisions smoothly). I'm making a 2D third person RPG game. Now when my player moves he gets blurry (pixels are not sharp), also he is stuttering when moving too. Any ideas how can I fix this?

I used this tutorial to make collisions: https://www.youtube.com/watch?v=p1rONoZ6u8o