Like mentioned already, her overhead Sen'enshu flip kick is easily punishable, with a startup of 26 frames and 15 frames of recovery.
In addition, if she doesn't have meter, she doesn't have a good wakeup option, aside from EX Spinning Bird Kick, and that can be read fairly easily. Her fireball is also a charge, so she's not winning a zoning battle, although Chun-Li players such as myself have the option of using her C.MP to slide under projectiles.
Hopefully that helps you out a bit.
If you need a Chun to face, I've got no problem in helping out. CFN is lionheart21.