Text and shape curves are always distorted, am I doing something wrong?

So I don't know much about Illustrator apart from it makes vectors, which is good for web and print. My problem is whenever I make text and shapes with a curve in them the fill becomes distorted when zoomed or enlarged.

I'm thinking I'm doing something wrong or whatever, cant find a solution online anywhere, so I'm asking here. I've attached a print screen of some text and shapes zoomed in. What am I doing wrong?