Why retroarch ?

Hi, I'm new here, and reading the Emulator 101 and it recommends:
PS1/N64 and older use Retroarch.

Perhaps it's me but every time I install retroarch (Every year I install it again) I feel like don't know what to do, everything is so complicated, after downloading almost a 1GB in linux I'm stuck 10 minutes to load a game every time, and navigating the menu is so anti intuitive for me.

I have installed Duckstation, Blastem, Fceux and a couples of clicks away I'm playing, even Blastem that I believe could improve a little bit the UI.

I'm missing something of retroarch ? Or there is a alternative that is more user friendly and don't need 1 GB of downloading ?