My worst matchups are cage and raiden as well. I'd say agaisnt cage, you can only hope to upblock his overhead ender or his low ender into rising star and punish hard. Trying to contest his pressure is most of the time a death sentence. You might also want to try staying in b1 range and whiff punish him, upclose pressure with 2,1,2 will probably just get you his d4 into plus pressure, as you might have experienced.
Kenshi is mostly manageable if you upblock his downward cuts, or at least consistently flawless block them, which isnt that bad really. At midrange, most kenshis will try to stagger with that sword unsheat normal (not sure what button it is, maybe b2), so again you have to be smart and try to whiff punish and be patient. Against Sento pressure, try armoring the 22 slashes through the gap, most people online dont have the execution to make it gapless. Another thing is just YOLO death spin + cyrax helicopter to close the distance if Kenshi keeps backdashing, but obviously you have to use this sparringly, as a mistiming will get you punished.