I've had the following problems:
1) They wrote a driver that blew out my speaker and I had to wait 5 weeks for a replacement. http://appleinsider.com/articles/16/11/30/apple-updates-boot... 2) There is graphical tearing and glitching everywhere. http://www.macrumors.com/2016/12/02/new-macbook-pro-graphics... 3) The OS restarts itself randomly. 4) You cannot plug in an external monitor and use a bluetooth mouse simultaneously.
I love macOS. I make software for macOS. The decline is real and people should start considering alternatives.