How are you "getting your words on screen?"
There are two likely causes for text that does not look good. The first is that you have the zoom factor for your composition too high. Make sure it is at 100% or less. That's the first box on the left side at the bottom. Second reason is that you are using the font that is too thin or too small. Video is pixels So tiny fonts don't work very well.
If your fonts look bad when rendered then you probably are trying to do something like 100% white fonts on a black background. Video compression hate that kind of stuff. You've got to watch your levels and saturation.
Without any details about your composition for your workflow those are the best answers I can give.