Here is how releasing DLC & patches works. This applies to CDPR and to the other major studio I have worked with. I cannot guarantee this is how it works everywhere, but in my experience, this is how it works. This is an extremely simplified view and doesn't take into consideration all the business agreements, contracts, potential technical delays, unforeseen hoohah, etc and likely a million things I am forgetting that goes on, but gives you a rough understanding.
Studio finishes making DLC/patch
Studio alerts partners that patch/DLC is ready for testing (partners includes Microsoft, Sony, GOG, Steam, etc)
Partners test DLC/patch to make sure it works correctly for their systems
If problems are found, DLC/patch is reworked until issues are fixed.
Once DLC/patch is approved,date of release is scheduled (usually ASAP for patches, DLC on specific date)
Final DLC/patch is sent to partners for propagation onto servers for release
Release
Sometimes, depending on the partner, their servers may be scheduled on different dates or times depending on where in the world they are. THIS IS BEYOND THE STUDIOS CONTROL. This is the business practice of the partner and something that studios and fans have to accept. Partners and studios work together closely to communicate when possible the timing of releases, however, due to timezones and schedules, communication is not always possible.
Does this mean you should blame CDPR? No.
Does this mean you should blame partners? No.
It means you should understand that THIS IS THE WAY IT IS. It is not because the studio is lazy. It is not because the partners don't care. It is not because one platform is better/worse than another. This is the business. It is the way it is. Some things like this or different release dates depending on country/region are the way business is done. Can it be changed? Possibly, but it is not a simple change as it isn't one small studio making the change, it is mega-companies making global policy/practice changes.
So Funkenblows, now you know. You can continue to blame whomever you want to blame, but at least now you may possibly correctly understand why you are blaming whomever you are blaming. Just so you know.