The “B” and “D” from the After Effects preview window look fine if you back away from the screen, but the “A” doesn’t. Then in the output render, they all look pretty lousy, especially the “A.” I can’t ask people to back away from the screen, though – those snaps are actual-size. You seem to mean that it’s simply impossible to use large text without this kind of distortion.
Adding a 1-3-px fast blur does work for me as a quick fix, but I find this whole situation bizarre. I’ve created whole worlds in this program, but a really big “A” is too much to ask?