You could claim jealousy, but that’s reductive. Elon Musk annoys a lot of people, for a plethora of reasons. It’s pretty easy to find wide ranging genuine criticism of him from numerous perspectives, if you want to actually understand. Or you could hand wave it all away and claim jealousy I guess, just know it’s a lazy explanation.
It’s more lazy to claim all the criticisms about him are true. So many of these criticisms are based off of clickbaity headlines. If you actually follow him closely, actually listen to his interviews over time, you will see he is very consistent in his words and actions. There is no doubt in my mind that he aims to do good for humanity as a whole.