I bought the Series X the day it came out, was a huge supporter of MS consoles going back to the OG Xbox. I probably have over 1,000 games for all of the Xbox platforms combined to give an idea.
Series X is great hardware with a lot of good features. The controller is a bit meh for me unfortunately as they didn't bother to do any real changes with it. The Dualshock 5 is a much better controller IMO, but the trade-off is the battery life is worse on that than the Series X controller. Either way it doesn't matter all that much to me.
But for me the real problem with the Series X is the genuine lack of exclusives. The only thing I use it for are Xbox One and backwards compatible 360 games even though I have several 360 consoles with one hooked up currently. I think GamePass isn't all that great personally. It's okay for trying certain things out, but I much prefer owning games whether it be digital or physical. However, I have shifted more back to physical purchases with digital purchases being the stuff no physical release existing.
All that being said, my complaint with this gen has nothing to do with hardware, but lack of exclusives as previously mentioned. It's like they blew their load on the hardware then said fuck it about software. I don't get it. They killed it during the 360 era with software, then completely forgot that you need it within two generations. I only keep the Series X because I like to play the few Series X exclusives here and there, but the PS5 gets more of my time these days. I go where the games are at the end of the day.