Why are cheetahs solitary?

i wanna know why cheetahs are solitary animals. doesnt make sence to me. they are the weakest of the big cats and fail at hunting often. so wouldnt it make sence for them to stick together? would make hunting alot easyer and they would be more able to protect theyre food from hyenas and lions. so if there is a specific reason for it id love to know. lol.