Can you do a quick /disableaddons in chat after you use those commands again just to be sure it’s not any other addon that might be causing it. Those commands should be doing their job right away.
If you install https://www.curseforge.com/wow/addons/advancedinterfaceoptions it’ll give you access to a UI for controlling FCT and then you don’t need to mess around with console commands. It also has a CVar browser so you can fine tune all the things.