From your birth to 18 years old, this stage belongs to the period of not being able to stand on your own feet, during which your parents assumed the right to support. Once you pass this age, you should be self-reliant and should not be borne by your parents.
After the maintenance period, you and your brothers and sisters no longer have the relationship of mutual support, and they are all independent individuals.
From the above legal point of view, whether brothers and sisters live well or not has nothing to do with you! You must rely on your own efforts to change your life, there is no such thing as enjoying success! Whether you are poor or rich is the result of your own efforts It is ok for them to lend you a helping hand out of love, but it is by no means their obligation!
Understand the above relationship, you should give up your sense of dependence and fight for it yourself! Life must depend on yourself!