Is it me? Will I ever be satisfied?

I agree, that is one area that I would have on my “con” list.  I do like to push the system now and then.  I think that will help.

@willgolf , I agree 100%. No matter what you have, you'll always want to try or think there is something better. Your equipment is fine, and I do agree with @russ69 , Mac and B&W dont have good synergy. Many here have 2 or systems to listen to. There are times I dont turn my Yamaha system (AS3200, CDS2100, B&W 803 Nautilus) on and listen my Emotiva rig for hours (PT100, X300, B1+). And now I want to try a Luxman 590 with Lii Audio S10.  My room is a 24'x20'.  Enjoy the hobby.

In the end, it depends on who you are.
 

And I certainly agree with the advice about treating the room before buying anything else. It's your biggest component. I find most fatigue is caused by the room.

It's possible to stop chasing what is uncatchable and the first step is to stop or greatly reduce reading audio forums or message boards, at least that was part of what worked for me. I also got tired of the know-it-alls like the people who say component x doesn't mesh with speaker x or these wires aren't sufficient for system x, etc. If you want to continue to spend money on new (or new to you) gear and lose money on the stuff you sell (if you don't keep it), go for it.

It sounds to me like you need time with your system. This hobby is a lot more subtle than we expect, a new system must go ‘crash, bang wallop’ for it to impress, but that isn’t what a capable system does. It took me a few months to fully appreciate what my system did, it delivers music so smoothly that it makes me sit and listen for hours. Now I understand it, I know exactly how I want to improve it; for rock and such I want more slam, so I’m looking into a subwoofer. I own a Gallo Acoustics TR3, the original, and it doesn’t quite deliver what I want hence why I’m looking at a new one. It was easy for me to hear what I want, because I was so familiar with the system. Similarly I know after that a new dac has to deliver on maximum clarity, I have a well damped room so I can afford to chase detail without worrying about bright fatigue. 
It’s easy to get a new system, expect the Earth to move because we are so attuned to bass heavy Bluetooth speakers and car stereos that we completely miss what the system is doing. Give it some time, patience will massively pay off in the end. I know you’re listening for a week, but honestly it took me at least two months to truly fall in love with what my system was giving me. Your ears will hear more and more of it as time goes and that will give you what you need to make wise additions/changes. Otherwise I guarantee you’ll buy something that perhaps you haven’t auditioned at home and be right where you are now. And if you just go for ‘loud’, you may be impressed at the start but in time you may find the system exhausting to listen to and realise that isn’t necessarily what you wanted.