What files exactly is dolphin saying your missing ? , Yuzu particularly is problematic as you really need an actual nintendo switch to dump game keys & profiles from in order to get it running , its very difficult to get running unless you own an actual switch , i looked into it back along & TBH for my own reasons i just did not see the point in it for me at leased. Now dolphin is My thing , been using it since way back in 2008 , i cant say i ever had it not actually boot due to something missing , its a great emulator if you love GameCube & wii so when it comes to dolphin i would love to help in any way i can , now i will say this , what i would do for now is ditch retroarch , its buggy , confusing & a complete mess of a front end , i have tried it at least 4 times & its never stayed on my PC for more than an hour , it's terrible , Launchbox on the other hand has been on here 3 days & no issues at all , in fact i bought a lifetime license just an hour ago , worth every penny & no DRM at all , so what i would do is start with Dolphin & no retroarch , no front end at all first get the standalone Emu working to some degree then start thinking of adding it to Launchbox, get rid of & uninstall retroarch for now , first are you using an x64 windows & pc ? (it only runs now on 64 bit) , also if your receiving an "This application has failed to start because XINPUT1_3.dll was not found" missing dialogue , you'll need to either or both update direct X & install Xbox 360 drivers (although unlikely if your on Win 10 as they are already baked in to the OS) , for the "This program can't start because MSVCP140.dll is missing" error you'll need to download & install the Visual Studio C++ 2015 for Windows 64bit , these are the only two issues i can think you might be encountering , so be sure your on an X64 platform , also make sure it comes from dolphin directly , here is the current build im using its a "bleeding Edge" build but its a real Gem for performance & compatibility the best i have had so i dont think ill be updating in a hurry , i can't recommend it enough
https://dolphin-emu.org/download/dev/da1fbbc5d5d0eda5fcdccadd20207b4b525f8a7e/
Also some more detailed system info would be good , like Os details & build etc to be able to help you more