The character is finished for KOF-Extra from the 119way blog but not released. Should be a release at some point. He is high on the trade value for now, and once he gets traded around he will show up somewhere.
There are some sprites for him on Mugen archive if you need them.
You are only slow at making sprites for now. Within a week you will already see a vast improvement in speed. I would say you need to keep doing it and then look for help when you are creatively stuck.
Re: Mugen China KOF 2k2 Original Small Select Portaits