(Trying to) Install Windows 7 on a Macbook but everything goes wrong..

Here is my attempt to install Windows 7, but it just straight up goes wrong.. ● FAQ Q: How did the Mac have windows before? A: It was a mac that was passed down to me! Q: How did it stop working? A: I tried to install a boot manager and then I uninstalled it? (Refind). I dont even know what I did tbh. ● LINKS - https://www.youtube.com/@UC0gseu1Xxg2WgmWUvHe3Qdg (More links on the way..) . . . . . ● MUSIC - 8-Bit Big Band Creative Exercise (https://www.youtube.com/watch?v=OKUu86Cw7Tc&ab_channel=The8-BitBigBand) - BO2 MP Theme (https://www.youtube.com/watch?v=sIWnz0x_pSQ&ab_channel=spllitz) - Wii Shop Theme (https://www.youtube.com/watch?v=_xc7tNbjnHM&ab_channel=RingsOfGeonosis) - MMBN5 Liberation (https://www.youtube.com/watch?v=qz1Xq19P7rg&ab_channel=Frygoon) - MMBN5 Undernet Theme (https://www.youtube.com/watch?v=EGhhemi3cOQ&ab_channel=Frygoon) - MMBN2 Boss Theme (https://www.youtube.com/watch?v=kYV_NrOgAjI&ab_channel=ZeroX_MK)