What emulator? Did you try changing every input in the setting of the emulator?

on cloud? If not, what emulator, ram, cpu and graphic card?

What emulator do you use?

Maybe change the video plugin

You're missing a graphic card if i'm not mistaking.

Yo You have to configure your input in dolphin

Yop Tu peut installer romstation dans presque n'importe quel dossier (clé usb ou disque dur). Les jeux téléchargé sont parfois dans d'autres formats que .bin ou .cue. Tu dois parfois les extraires (romstation le fait automatiquement) ou parfois les jeux sont au format .zip (donc il ne faut pas les extraire).

You just have to customise your input in the emulator software. Each emulator have to be configured.

If you would able to do that, you won't be able to see half the screen or it will be stretched/distorded...

antivirus are usless in modern days (except windows defender)

try reinstall

You shouldn't reinstall romstation every time you try to launch it... you have to launch the installed app from the installed folder (or from the shortcut)

well, if you're not overloading your wifi with other devices and you're not that far from your wifi box... then you should try to connect it with a ethernet cable... And if that doesn't solve anything... it mean you just have a bad internet and should get a fiber connection and then if it doesn't solve, it mean you're not in France (romstation's server are in France).

No, you just have to wait to play because there is only a max of 50 free cloud users.

It happens when you switch to another reseau like a vpn or something else.

To add as a dolphin game, you have to choose the correct console (gamecube or wii I guess) when you add to romstation. To customise controls, you have to do it in the menu of dolphin, under the right controler depending on the console (wiimote/classic controller for wii games for exemple)