How can I improve my Olimar?

This is my replay (I'm the Olimar): https://www.youtube.com/watch?v=lEiIpGthOsg

This is... basically my average game. I've been stuck at ~2 million GSP for who knows how long. I go to a local every month, I've been practicing, I know the ins and outs of my character and have been playing Olimar for about 2 years, but I think I still need improvement (you can see how bad I lost). What should I do?