Just annoying things like missing video codecs in fedora. Why the heck do I have to install something just to watch a video online?! Or the fingerprint reader in Ubuntu only works for the one session, after that it forgets all my prints again. Or using proton and missing dx11 drivers in pop os, I know they are crappy Microsoft software, but are required for some games. Or that Ableton, fusion360, affinity are not available for Linux. I know it’s not Linux fault, we need big companies to invest in Linux in order for it to gain more traction. Or all the package managers. Which should I use? Snap comes with Ubuntu but people say it’s bad and flat pack is better. Or that there is no sound output selection or mixer in the gnome top bar, I need to install an gnome addon for that. There are just little things compared to Mac or windows that Linux is missing or has difficulty with. Don’t get me wrong, I use Linux full time on my laptop now and try to move to Linux on my desktop as well. Those are just things that tech savvy people would struggle with, and I can’t blame them form calling Linux difficult then