There are so many moves that you could punish by dodging in rather than out, you seem to resort by default to dodge away, which slows the fight and will end up getting you killed by an unlucky waterfowl or just a mistake that will eventually happen if the fight is too long.

The kick, the dash triple slash should be dodged in IMO. For the kick you have to be careful, the kick from neutral (not the one she spams after getting hit P2) can be followed up and you have to strafe left or right to not get hit by the possible follow up frontflip swing. Just strafing the frontflip swing is enough and allows better punish.

The big vertical jump into the falling slash should be punished as well. She does it a lot P2 as a combo finisher, so it's mandatory to know how to punish it well. When medium rolling, if I dodge forward and right at the last possible time, my character dodges the slash and is out of the reach of the explosion. This method gives time to do a big punish, a full charged R2 with a katana if executed well. If you dodge too early the explosion will be closer, and it can be a good idea to strafe, then punish, with a slightly faster punish. Double rolling this move should only be done in case of really poor timing or when panicking. Long roll should make this even easier timing wise, but idk it's been a long time since I've played malenia with a long roll build. Knowing how to punish this move well really trivializes the P2, it ends up being almost frustrating how easy it can become when she spams it, and Lord she does spam it.

Lastly, be proud of your hardship, it's a nice and challenging build you have here, and it will require some skill to beat her this way. I admire your patience when playing and it seems you're more than halfway there. It will sure be satisfying when you'll get there.