I don't hate macOS, and I don't even know if I consider it worse than Windows, but here are a few things I dislike.

1. Overuse of icons with no clear way to turn on labels combined with a weirdly high time for tooltips to appear makes things confusing.
2. Finder doesn't have a way to just go up a directory or easily type/get the path of the current folder. The home folder is not in the shortcut area by default.
3. "Alt tabbing" between windows behaves very differently, though it's not necessarily worse, just different. Command tab switches programs. Command back tick switches windows of that program. So if you want to switch between windows of a browser it is a different shortcut. This one is entirely opinion based. But still, there's no way to change the behavior.
4. Notifications go away after a very short time period or stay forever. There isn't an easy way to get them to stick around longer without making them stay until you dismiss them. It'd be nice to have a middle ground between a few seconds and forever.
5. Closing a window doesn't necessarily close a program. Like the "alt tabbing" thing this is opinion based too, because these approaches both technically predate the other approach. Sometimes you close a window and it has a dot on the task bar meaning it's still running. It's very odd.