Illustrator Pen tool

Normally a vector-based path will only be wiggly if the path has many anchor points or if the direction handles on smooth points have been dragged out way too far or not far enough. If there is a software glitch affecting the smoothness of paths I would think the glitch would affect any object in the document with Bezier curves, be it geometric shapes or type.

Curving paths will be more smooth and flowing when they have as few points as possible. The direction handles on smooth points need to be positioned properly and in balance with adjacent points on the path. Long ago I learned a lot about drawing smooth lines by studying how letters in high quality fonts were drawn out, converting the type object to outlines and then examining where the points and direction handles were placed.

Anyone new to Illustrator needs to practice using the Pen tool in conjunction with the keyboard shortcuts available to the tool. The shortcuts are very handy, allowing any points on the path to be adjusted while the path is still being drawn. Plus the Ctrl-Alt-Spacebar combos can be toggled to zoom in/out and hand-pan the view of the work.

Astute Graphics' Vector First Aid plug-in can be pretty handy at "auditing" artwork. It can automatically various kinds of issues in artwork.

Can you show something?