Hey Gamegenie, you didn't do that bad!! Sure you missed several crucial throughout the fights but you're basic techniques are there. You're kind of like me, using AA, AB, kicks, and other neutral attacks that are great imo. Lately, a lot of the Raph players Ive seen are overusing 3B, Prep moves, Prep BB and 6BB BE, and 22B. These moves are important and do good damage but are too linear and dangerous if used too much. My style with Raph is focused on a variety of neutral moves more than SE and Prep. It's fine if you didn't use Prep or SE so much...in fact you don't want to use them often (you'll become vulnerable).
A few tips: Do Prep A+B after 66B. It's guaranteed and does the best damage. Do not try to get a ground hit with 1B, it whiffs easily. After 33B, do 66B+K for good damage. Throw out more 2A, 66B, 22B, 33B, kicks, and punish unsafe moves with 3B, Prep BB.