The things you are complaining about take a week, at most, to adjust to. I am a former Windows user who switched to Macs about seven years ago.

Enter for rename is perfectly sensible to me. Personally, I use it more than Cmd+Down to open files.

The Cmd+C + Cmd+Shift+V paradigm for cut/paste makes just as much sense as the Windows paradigm. Either way it's a just copy and delete function. Would you rather choose to delete at the time of the "paste" or at the "copy?" I don't see a clear reason to prefer one over the other.