Catalina not allowing to change read/write permissions despite having SIP disabled

**Currently Running:** macOS Catalina 10.15.1 **Issue:** Ever since I upgraded to Catalina, macOS is not allowing me to change read and write permissions on system protected files, hence, I am not able to tweak the system as per my likes and dislikes. **Steps Tried To Solve The Issue:** SIP, always remains [disabled on my boot drive](https://apple.stackexchange.com/questions/208478/how-do-i-disable-system-integrity-protection-sip-aka-rootless-on-macos-os-x) . So, no question arises regarding any conflict with system integrity protection. I have also tried to force change the permissions on the system files I want to edit using certain brute force commands, which I can't recall the name of, right now. But, I have tried. As of now, I am still unable to change read and write permissions on system protected files and resources.