Screw those guys. At least for amateur/hobby work, I've used the following for years and love them. I also try to regularly donate to them. Instead of Illustrator for drawing, use Inkscape https://inkscape.org/ and/or Krita https://krita.org/en/ . Instead of Lightroom for developing digital photos, use Darktable https://www.darktable.org/ Instead of Photoshop for touchups, use GIMP https://www.gimp.org/ . Instead of…
I don't know if Atril is a good Acrobat Reader replacement either. Does it support PDF forms and annotation? That's what most PDF readers are missing.
Apple's preview is pretty great from that point of view. I've also used Xournal++ for that in the past.