Text 3D extrude and bevel leaves protruding nails on the edges of the text?

I am having two annoying issues:

First, the 3D extrude and bevel on text leaves the edges of text with sticking out nails. I dont know how to fix it. It looks so weird.

Secondly, the 800 x 800 pixels display huge graphic Pixelization. It is also equally annoying and I dont have a fix for that either.

Could anyone please help me how to sort these out. I am newbie so please dont be mad at my silly questions.

Many thanks in advance.

PFA a reference photo for these issues.