Please elaborate how to fight Izanami/Rachel using only system mechanics. Even Carl/Kune are hell if you lack an ounce of projectile invul or mobility. Even if you IB everything on Izanami she has a tight blockstring to fly/unfly and make you keep blocking. Guard Bonus is a meme most of the time but these two can activate it consistently, there is no "counterplay" to be had besides holding the L and praying that your IBB will push them far enough after the 2nd unfly for you to at least jump out of pressure so you don't have to give them more gauge AND the chance to fuzzy/unblockable your ass.
I used to bitch a lot about Nine but after the game solidified itself and people streamlined top tier to single player, she's the least of the problems, even if she doesn't have hurtboxes. It is a retarded game, doesn't mean it's bad but it's definitely cursed with the fact that if the players are on high level, you're gonna climb that mountain in those matchups. I know because I played Az that's a stupid ass gorilla then moved to Jubei and Kagura just to see how unfair that roster is.