Not sure if you're using the OS sliders, but if not, it might be worth your time to find the old thread and plug in the last version. I don't remember specifics for FIFA23, but I have a few general suggestions:
- Use full manual controls and remain on World Class
- Give yourself a +1 sprint and/or accel advantage over the Legendary CPU
- Increase CPU error values and/or decrease user error
FUMA controls make it a lot harder to create and finish chances which obviously could help tame your attack. This might be a good option if you're still reasonably challenged by the CPU attack on World Class. As for slider advantages, I know some like to keep them even but I find it helpful when making the step up in difficulty. Playing as much as you do, you'll probably adapt to Legendary and can even it out in time if needed -- not that I dispute Legendary can be imbalanced.