There were a few.
The biggest, or at least most noticeable issue is your complete obsession with being staffless, you rarely if ever had your staff with you, which got you rocked with combos you could've otherwise avoided.
Aside from leaving off combos when you didn't have to you didn't follow up on much of anything...
Corner pressure and mixups are litchi's greatest strength, but you didn't even pressure opponents while they were in the corner, much less use any of her mixups. You zoned fairly well at times, but your reliance on 426D was extremely noticeable and at times ruined your zoning because of your reliance on it. It's a potent move, but it has it's place just like everything else.
Get more comfortable with using her staff, don't always drop it on the ground, having her staff leads to her most damage combos and gives you access to her best zoning moves (her pokes in 5B[m] 6B[M] j.B and j.C), and her best defensive moves (tsubame, itsuu). Her biggest and hardest hitting combos will involve both having the staff and not having the staff, but in general the best ones start with her having the staff and come off of her great staff pokes or staff defensive moves. Keeping the staff will help you open up the game and start your offense while minimizing risk.