Recent M1 user here - I had a PowerPC mac back in the Leopard/Tiger days. I thought OSx would have come on leaps and bounds since then. It's....more or less unchanged. As well as this crazy installer thing, there's quite a bit about Macs that just seems off.. My list of "things that don't seem right" as a long term Windows/ChromeOS user - Window snapping isn't built in outside of fullscreen mode (seriously?!) - Sleep…
Sleeping the mac does not sleep the mac, it wakes up at all sorts of times This sure used to work. My 16-inch MacBook Pro (as in, the new keyboard model) just does not want to stay asleep if the screen is open. Even if I put it in Do Not Disturb mode, notifications (like my nightly reminder to take my melatonin) wake it up, seemingly no matter what option I toggle.
I assume you have Power Nap disabled and no devices attached that try to wake the MacBook?