Aside from the issues in Corel Font Manager, I'm not seeing much in the way of slow-ness issues in CorelDRAW. Then again, I don't have a giant amount of fonts and an associated giant sized database for Corel Font Manager to load either. FWIW, I am running CDR 2022 on notebook and desktop PCs, both of which have 11th gen Core i7 8-core CPUs, 64GB of RAM, RTX-3070 GPUs and 1TB NVMe boot SSDs. I have Win11 Pro running on the work desktop and still have Win10 Pro running on my notebook. The CorelDRAW application launches pretty fast. But these new machines boot up very fast too.
Not everything is perfect though. CDR 2022 has some stability issues. Not as bad as CDR 2019, but not acceptable either. On both my personal notebook and work desktop I've seen strange crashes happen just out of the blue. It doesn't matter if it's a complex document or a new layout in the simple starting stages. Sometimes the application will stop refreshing when an object is moved. Or it won't show the selection dots around an object when it is clicked. Usually I can save my work. But I have to press Ctrl+Alt+Delete to bring up Task Manager to end the CorelDRAW process. The application won't close on its own when clicking the "X" in the upper right corner. That kind of crash is annoying, but easy to move past. The other kind of crash is where I'm working along then all of a sudden the program hangs for a second and then "poof" the entire application window disappears. Any changes that haven't been saved are lost. Obviously that kind of crash is far more infuriating.
Others are complaining about these crashes in the CorelDRAW user forums. This goes on top of my long running gripes about the font handling bugs.
Regarding X6, I'd have a hard time regressing down to that version. A few important features have come along since then I wouldn't want to give up. The latest upgrade to v2022 was nothing to write home about.