I went through similar feelings switching to the Mac ecosystem (from Linux) in 2012... But I quickly settled on some tools I wouldn't be without now.

Finder is terrible, but I switched for Forklift early on. I think it's amazing, so much better than the Gnome and KDE file managers I used before. It covers so many bases, from being a twin-pane orthodox manager, directory comparer and synchroniser, bulk regex renamer, etc. Handles local directories as well as remote ones via SFTP, WebDAV, S3, Google Drive, SMB, NFS, etc. And switching to Alfred was a real pleasure. I could see where Gnome Do took inspiration from, but it's a pale imitation. I also installed iTerm2 early on, and I use it to this day. Easily the best fit terminal for my purposes.