Because they don't have anything productive to do.

They probably are fighting their demons, and get jealous when you’ve tamed yours. It has nothing to do w you, but rather themselves tbh

Insecurities may be😅

because it's already burnt 😂

Kyunki khud kuch krte nhi aur dusro ko dekh kar bss

Because they are jealousians 😂😂

Because they are interested in them

Because they not compete you😏

It's in human genes to get jealous from others due to various reasons such as love,money,happiness,success but we fail to understand that jealousy can be cause harm to oneself if exceeded beyond limit

Because when they can't reach your level, they get jealous bc.