Killaclown understands footsies and the general games mechanics. Knowing how to space yourself goes a long way in any fighting game. Killa also has a great knowledge of each character. While I do find him to be demeaning and incredibly rude (at least every time I’ve played him), there’s no denying his skill.
You don’t have to do tons of “fancy” stuff in KI to be good, but you do have to have a good understanding of what your character can do.
I main Sadira and I hardly ever do the fancy juggles that Kalypso does, and yet I still win most of my fights. It’s always cool to do really fancy combos and such, but it isn’t a requirement. In fact, in my humble opinion, you should be focusing on the fundamentals of KI and the fundamentals of your character first, before even starting to get into the more elaborate mechanics of your character.
I also recommend to try other characters as well. This will also help you understand how to fight them. You might even change your main.
Most of us here have changed mains and or main several. I started KI as a Sabrewulf main, but Sadira stole my heart. Don’t be afraid to experiment.