Wii doesn't support video output resolution above 480p, so I doubt if it's ideal device. getting a cheap used laptop/PC/RasPi(Yes I'm not joking) with linux installed on it might work better than Wii.
also usually using a streaming protocol provided by GPU manufacturer(such as Geforce Experience + Moonlight) performs way much better, if you're not aware.
anyway, If you really want to control your PC with your Wii, I found this project called WiiVNC: https://wiibrew.org/wiki/WiiVNC. You might want to try it. not sure if control is ideal for gaming tho. but keep in mind: using VNC to play games or watch videos is generally a bad idea and its performance is horrible.
Please I need help with this. I just homebrew my old 3ds console and downloaded a CIA file, but after surfing through for only 10 sec or less this appears. please can someone help me? Thank you in advance.