I don’t know what to tell you, Preview is an image viewer that is the default way to view PDFs on a Mac, and does so in a way that I’ve not seen bettered. It opens them without any formatting errors, allows for text selection and copying, and allows for rotation and cropping, as well as combining multiple documents and splitting them up. You just drag pages out and into the Finder to create a new document, or drag a second document into the thumbnail bar to combine.
The rotation ability is the reason I started using my old Mac mini at work. The crappy Dell PCs we’re normally given only have the free version of Acrobat installed, and I got sick of being sent landscape scanned document PDFs in portrait, so used my own MacBook to rotate them.