Gradients are pixelated when exported in gif format

idk if its my graphics card or the program but when i export as a gif the gradient is pixelated and its so unpleasant to look at because of how noticeable it is. been bothering me for a while and i cant find anything to fix it on the website

heres an example of the problem im having: Dropbox - Screenshot 2024-03-30 160840.png - Simplify your life

I have: AMD Ryzen 5 5600G with Radeon Graphics