Pretty stereotypical. You don't expect an OS to run smoothly and function properly after downloading it. Also, it's not necessary that it'd work fine on every system. Everyone had unique problems initially. Thankfully, Microsoft was quick enough to recognize the bugs/glitches and successfully patch them.
Around November 2021, I downloaded Windows 11 for the first time. It wasn't even functioning; lagged every single moment. But, after a few updates and tweaks, it got smoother. And to this day, I've been using it without any problems and I'm happy with what it offers.
It's pretty stable right now. Even if your encounter some issues, or feel that the OS doesn't match your expectations, you are free to report your problems/critiques to Microsoft, and they will get it fixed soon if it matters.
Also, I haven't heard of any OS that has been released successfully without having provided a single problem for all the users.