I've been wondering if I ever could do away with my envvy, greed and hatred for others. Could anyone suggest me some best ways to put these nasty feeliings to rest?
Counseling or therapy might help. I also know I've gained a lot of good insights from discussing problems with a close friend who is very intelligent and empathetic. You can sometimes get useful ideas from others, or from self-help books.
Therapy may be a start but remember there are many kinds of therapy. I do not mean the one where you have to pay somebody to listen to you. Do a Google search for "different kinds of therapy." Many things may come up. I for one, do not hate anyone. I was not always this way. Others say "yeah, but what if?" Sorry. IF does not count. Until it happens it is imaginary.
Start to appreciate what U ou have, and are capable of, and realize others envy you, too.
Find an organisation where you can volunteer to help others worse off than you are. Work for a political party that will change the system so that the very rich pay a serious amount of tax and wealth is distributed more fairly. The feelings are natural and we all have them but you can distract yourself from them by taking action.